WHU – Working Paper Series in Economics
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WP 23/01
Background: In view of steadily rising healthcare expenditures (HCE), studies on spending distributions can provide important guidance for policy decisions. Since the majority of HCE is concentrated in a few high-cost cases, this study focusses on the spending distribution between different cost-risk groups. We show detailed allocation structures, distinguishing several categories of HCE and the survival status of insureds to gain insights regarding the share of mortality costs.
Methods: Our analyses rely on data from a large sickness fund that covers around four million insureds. We classify the population into ten equal risk groups by costs and then determine expenditure shares of total HCE and daily per-capita expenditures depending on survival status and risk group affiliation.
Results: Our results offer that the often stated dominating effect of mortality costs of HCE is only evident in lower cost-risk groups and almost exclusively attributable to inpatient care. Furthermore, HCE in the calendar year of death is the same for most cost-risk groups, with the exception of risk groups at both ends of the distribution. However, in the case of the highest cost-risk group, the difference between survivors and decedents is proportionally small. The differences in cost structure between decedents in high-risk and other risk groups are primarily attributable to pharmaceutical spending.
Conclusion: Short-term high HCE in the year of death occur equally in all cost-risk groups and are hardly avoidable. By contrast, in the extremely high cost-risk groups, the cost difference between the year before death and the year of death is much smaller. Overall, this group remains the main target to influence the rise in HCE and its characteristics should be considered with respect to future HCE projections.
WP 21/01
This paper proposes a method for deriving the joint asymptotic distribution of sample proportions when the population and sample size increase jointly to infinity. The joint distribution of the sample proportions is derived by reducing the multi- variate to a univariate problem and applying the Cramer-Wold device. Knowing the asymptotic distribution we are in a position to conduct inference on linear or non-linear functions of the population proportions such as a ratio or the log-odds. We motivate and develop our method by means of a topical epidemiological application, namely the infection fatality rate of a virus such as SARS-CoV-2. We demonstrate that our method can be extended to more general settings of interest.
WP 20/03
We examine the effects of the COVID-19 pandemic on the economic decline expected in Germany in 2020. The magnitude of the economic slump that will occur in 2020 depends on the extent of the slump during the shutdown, on the point in time, at which a significant easing of shutdown occurs, and on the length of adjustment process towards the structures that prevailed before the pandemic. We derive several scenarios and find that the shutdown will only remain in the single-digit percentage range if we apply very optimistic assumptions about the extent of the initial decline in GDP during the shutdown and the speed of adjustment after opening up of the economy. However, assuming that the economic crisis cannot end before the medical crisis ends, which medical experts project not to happen before the end of 2020, such optimistic assumptions do not appear realistic. Hence, we find it more likely that the percentage decline of GDP in Germany will be two-digit in 2020. Our findings are in contrast to the growth projections recently issued by the German Council of Economic Experts or by the Federal Ministry of Economic Affairs and Energy of Germany.
WP 20/02
This paper documents that ECB announcements on monetary policy increase stock market volatility in the euro area (EA) using several volatility measures from January 1999 to December 2019. Employing event study methods, a more pronounced impact exists following the global financial crisis starting in 2007. All assets react similarly so that no national peculiarities arise. The effects also spill over to 12 non-EA markets analyzed. Stock markets are more sensitive to negative monetary policy news than to positive ones. Further weighting the announcements by financial market reactions, stock markets behave in a more heterogeneous way.
WP 20/01
The profession of anaesthesia technologist is a relatively new profession in Germany. The German hospital Association published the first training guideline in 2011. Likewise the surgical technologist profession, the profession of anaesthesia technologists are not officially certified. Hence, similar disadvantages such as further career restrictions and uncertainties in case of unemployment exist. Even the hospitals need to cover the full training expenses. The training of an anaesthesia technologist lasts three years, containing of practical work experience within the anaesthesia units such as the post-anaesthesia caring unit and a theoretical education. The action site is limited to the anaesthesia units only. An anaesthesia technologist is an assistant to the doctor and takes care of the patient before, during and after the anaesthesia. Since the anaesthesia technologist profession is a very young profession group, little is known about the preferences of this group. However, hospital manager need to understand the individual preferences to be able to provide a target group tailored recruitment.
The motivation was to provide results to inform the human resource management of hospitals about the preferences of the very young profession group of anaesthesia technologist with respect to contribute to a successful development of this profession in order to cope with the current labour shortage crisis.
WP 19/02
Nursing without caring?
(2019)
We know that existing professions in the health care sector value work environment and job conditions to a great extent. However, we are also witnessing an expansion of new roles into the health care sector, many of which substitutie the tasks of existing professions. This may be efficient, in that it releases professionals’ time. However, there is little understanding of what motivates these new professions in entering or remaining in these newly created roles. This study tries to evaluate the preference structure of one of these new staff groups, surgical technologist, through examining the preferences of trainees, defined over a number of attributes, in this group. The DCE study covers 80% of the target population. The results show a vigorous disfavour towards any perceived nursing job characteristics such as caring activities, hierarchical work environment or shift types. The results inform policy makers and hospital manager about the importance to focus not only on the nursing profession but also to take into account the existence of a group of people who is willing to work within the health care system however, associated with strong preferences against nursing activities, especially caring. Implementing and further development of new and specialised profession through reallocating former nursing tasks- should be considered while coping with labour shortage.
WP 19/01
This paper examines the role of uncertainty in the context of the business cycle in the Eurozone. To gain a more granular perspective on uncertainty, the paper decomposes uncertainty along two dimensions: First, we construct the four different moments of uncertainty, including the point estimate, the standard deviation, the skewness and the kurtosis. The second dimension of uncertainty spans along three distinct groups of economic agents, including consumers, corporates and financial markets. Based on this taxonomy, we construct uncertainty indices and assess the impact on real GDP via impulse response functions and further investigate their informational value in rolling out-of-sample GDP forecasts. The analysis lends evidence to the hypothesis that higher uncertainty expressed through the point estimate, a larger standard deviation among confidence estimates, positive skewness and a higher kurtosis are all negatively correlated with the business cycle. The impulse response functions reveal that in particular the first and the second moment of uncertainty cause a permanent effect on GDP with an initial decline and a subsequent overshoot. We find uncertainty in the corporate sector to be the main driver behind this observation, followed by financial markets’ uncertainty whose initial effect on GDP is comparable but receding much faster. While the first two moments of uncertainty improve GDP forecasts significantly, both the skewness and the kurtosis do not augment the forecast quality any further.
WP 18/06
At the beginning of their career civil servants in Germany can choose between the social health insurance (SHI) system and a private plan combined with a direct reimbursement of the government of up to 70 percent. Most civil servants chose the latter, not only but also because they have to cover all contribution payments in the social system themselves, while normal employees get nearly 50 percent from their employers. The city state of Hamburg decided to change the system by paying a share of the contributions if civil servants choose the social plan. We use a stochastic microsimulation model to analyse which socio-economic types of civil servants could benefit from the Hamburg plan and if this changes the mix of insured persons in the SHI system. Our results show that low income and high morbidity types as well as families have a substantially higher incentive to choose SHI. This reform might thereby increase the adverse selection of high risk cases towards SHI.
WP 18/05
Gone with the windfall
(2018)
Due to the debate about the generosity of LTC insurance benefits the German government decided to increase benefits and widen the circle of LTC beneficiaries with the Second LTC Strengthening Act. In this paper, we evaluate the long-term implications of this recent reform for the German LTC insurance scheme. Using the framework of generational accounting we show that the reform has led to a widening of the short-term gap between revenues and expenditure and that the LTC insurance is not sustainably financed, neither pre- nor post-reform. By the early 2020s there will be fiscal pressure for further reforms. From an intergenerational perspective, the reform can be seen as a windfall to current beneficiaries increasing the intergenerational redistribution through the pay-as-you-go system.
WP 18/04
This paper examines the recession probabilities for the Eurozone along four different dimensions: First, we identify the best performing indicators for a recession within the next 12 months based on 43 underlying single variables and their different transformations in a benchmark model. We find that a modified version of the yield curve incorporating the shadow interest rate removes the downward rigidity of the front-leg and restores part of the informational content of the term spread at the zero lower bound. However, the best performing single indicator of the benchmark model is Real M1 followed by the Purchasing Managers Index (PMI), the investment grade corporate bond spread and the Terms of Trade. Second, the paper establishes three submodels to increase the lead-time and the stability of recession models: (i) Monetary transmission channels via principal component analysis; (ii) Bivariate regressions to identify paramount combinations; (iii) Unstable surges vis-à-vis the Hodrick-Prescott trend to detect animal spirits and hawkish mistakes. Third, the analysis is extended over various forecasting horizons (6m, 18m and 24m). Fourth, the results are analyzed from the perspective of risk-affine and risk-averse investors.
WP 18/03
This paper develops techniques of estimation and inference in a prototypical macroeconomic adaptive learning model with slowly decreasing gains. A sequential three-step procedure based on a `super-consistent' estimator of the rational expectations equilibrium parameter is proposed. It is shown that this procedure is asymptotically equivalent to first estimating the structural parameters jointly via ordinary least-squares (OLS) and then using the so-obtained estimates to form a plug-in estimator of the rational expectations equilibrium parameter. In spite of failing Grenander's conditions for well-behaved data, a limiting normal distribution of the estimators centered at the true parameters is derived. Although this distribution is singular, it can nevertheless be used to draw inferences about joint restrictions by applying results from Andrews (1987) to show that Wald-type statistics remain valid when equipped with a pseudo-inverse. Monte-Carlo evidence confirms the accuracy of the asymptotic theory for the finite sample behaviour of estimators and test statistics discussed here.
WP 18/02
This paper employs event study methods to evaluate the effects of ECB’s nonstandard monetary policy program announcements on 10-year government bond yields of euro area member states. It covers data from 11 euro area countries from January 1, 2007 to August 31, 2017 and distinguishes between the more solvent countries (Austria, Belgium, Finland, France, Germany, the Netherlands) and the less solvent ones (Greece, Ireland, Italy, Portugal, Spain). The paper makes three contributions to the literature. First, it is the first paper to reveal that measurable effects of announcements arise with a one-day delay meaning that government bond markets take some time to react to ECB announcements. Second, it quantifies the country-specific extent of yield reduction which seems inversely related to the solvency rating of the corresponding countries. The reduction of the spread between both groups in response to an event is due to a stronger decrease in the less solvent group. Third, this result is confirmed by letting the announcement variable interact with the spread level, which is an innovation in this strand of literature. By employing different data as control variables, it turns out that the results are robust for a given event set.
WP 18/01
We analyze the effects of limited feedback on beliefs and contributions in a repeated public goods game setting. In a first experiment, we test whether exogenously determined feedback about a good example (i.e., the maximum contribution in a period) in contrast to a bad example (i.e., the minimum contribution in a period) induces higher contributions. We find that when the type of feedback is not transparent to the group members, good examples boost cooperation while bad examples hamper it. There is no difference when the type of feedback is transparent. In a second experiment, feedback is endogenously chosen by a group leader. The results show that a large majority of the group leaders count on the positive effect of providing a good example. This is true regardless whether they choose the feedback type to be transparent or non-transparent. Half of the group leaders make the type of feedback transparent. With endogenously chosen feedback about good examples no difference in contributions can be observed among transparent and non-transparent feedback selection. In both experiments feedback shapes subjects’ beliefs. With exogenously chosen feedback, transparent feedback tends to reduce beliefs when good examples are provided as feedback and tends to increase beliefs in when bad examples are provided as feedback compared to the respective non-transparent cases. Our results shed new light on the design of feedback rovision in public goods settings.
WP 17/08
This paper studies the effect of the strength of Bilateral Investment Treaties (BITs) on FDI activity. We develop an index for the strength of international dispute settlement provisions included in BITs in order to examine the role the content of BITs plays in attracting FDI. To this end we make use of data from the UNCTAD's International Investment Agreement Mapping Project and measure the provision strength of 1,676 BITs. Using panel data of bilateral and total inward FDI flows and stocks we study the effect of BITs on FDI. Our main finding indicates that stronger international dispute settlement provisions in BITs are indeed associated with positive effects on FDI activity.
WP 17/07
Strong consistency of the least squares estimator in regression models with adaptive learning
(2017)
This paper looks at the strong consistency of the ordinary least squares (OLS) estimator in a stereotypical macroeconomic model with adaptive learning. It is a companion to Christopeit & Massmann (2017, Econometric Theory) which considers the estimator’s convergence in distribution and its weak consistency in the same setting. Under constant gain learning, the model is closely related to stationary, (alternating) unit root or explosive autoregressive processes. Under decreasing gain learning, the regressors in the model are asymptotically collinear. The paper examines, first, the issue of strong convergence of the learning recursion: It is argued that, under constant gain learning, the recursion does not converge in any probabilistic sense, while for decreasing gain learning rates are derived at which the recursion converges almost surely to the rational expectations equilibrium. Secondly, the paper establishes the strong consistency of the OLS estimators, under both constant and decreasing gain learning, as well as rates at which the estimators converge almost surely. In the constant gain model, separate estimators for the intercept and slope parameters are juxtaposed to the joint estimator, drawing on the recent literature on explosive autoregressive models. Thirdly, it is emphasised that strong consistency is obtained in all models although the near-optimal condition for the strong consistency of OLS in linear regression models with stochastic regressors, established by Lai & Wei (1982), is not always met.
WP 17/06
Das Hamburger Beihilfemodell
(2017)
Zu Beginn ihrer Karriere verfügen Beamte über das Privileg zwischen einer Absicherung im System der gesetzlichen Krankenversicherungen (GKV) und den privaten Krankenversicherungen (PKV) wählen zu dürfen. Bislang entscheiden sich die meisten Beamten für letztere, auch weil sie in der GKV sowohl Arbeitnehmerals auch Arbeitgeberbeitrag zahlen müssten, in der PKV dagegen eine Kostenbeteiligung im Rahmen der Beihilfe vorgesehen ist. Die Stadt Hamburg hat nun jedoch beschlossen, zukünftig Arbeitgeberzuschüsse zur GKV zu leisten, um damit eine „echte Wahlfreiheit“ herzustellen. Wir zeigen anhand eines Vergleichs der internen Renditen in beiden Systemen, dass sich das Kalkül für den Durchschnittsbeamten trotz dieser gefeierten Reform kaum verändern wird. Vielmehr wird es wahrscheinlich zu einer verstärkten adversen Selektion von hohen Gesundheitsrisiken zu Lasten der GKV kommen.
WP 17/05
In der deutschen Gesundheitspolitik wird seit langem unter dem Stichwort Bürgerversicherung über die Einbeziehung aller Bürger in das System der Gesetzlichen Krankenversicherung diskutiert. Dabei wird meistens die Perspektive der GKVVersicherten eingenommen, seltener diejenige der Versicherten der PKV. Es stellt sich jedoch insbesondere für die Gruppe der Beihilfeberechtigten die Frage, welche monetären Konsequenzen durch eine Bürgerversicherung für sie entstehen und in welcher Höhe daraus Kompensationszahlungen abgeleitet werden können. Unsere Ergebnisse zeigen: Selbst, wenn diese Kompensationen weniger als die Hälfte der Differenz der Versicherungsleistungen zwischen PKV/Beihilfe und einer
Bürgerversicherung abdecken, hat der Business Case Bürgerversicherung für die Gebietskörperschaften zumindest kurzfristig negative fiskalischen Folgen.
WP 17/04
This paper uses the Consensus Economic Forecast poll to investigate how forecasters in the foreign exchange market form expectations. In order to explain the expectation formation of forecasters, around 50,000 forecasts for 22 OECD-member currencies are analyzed. The results indicate that forecasters do not form expectations rationally when tested for unbiasedness and orthogonality. The results also suggest that forecasts for industrialized economies show a mix of trend-following and fundamentally-oriented behavior. By contrast, forecasts for emerging markets show significantly more destabilizing expectations. We find forecasting tendencies to strengthen in the short-run and medium-run when controlling for the Balassa-Samuelson effect. For long-run forecasts however this can not be confirmed.
WP 17/03
In this paper, we study the bias in interest rate projections for four central banks, namely for Czech Republic, New Zealand, Norway, and Sweden. We examine whether central bank projections are based on an asymmetric loss function and report evidence that central banks perceive an overprojection of their longer-term interest rate forecasts as twice as costly as an underprojection of the same size. We document that rationality is consistent with biased interest rate projections which contribute to explaining the central banks’ behavior.
WP 17/02
In this article we examine the influence of two goal compensation schemes on lying behavior. Based on the die rolling task of Fischbacher/Föllmi-Heusi (2013), we apply an individual goal incentive scheme and a team goal incentive scheme. In both settings individuals receive a fixed bonus when attaining the goal. We find that under team goal incentives subjects are less inclined to over-report production outputs beyond the amount which is on average necessary for goal attainment. Investigating subjects’ beliefs on their team mates’ behavior under team goal incentives reveals that subjects who either believe that lying is not profitable (i.e., the team goal cannot be reached with a lie) or not absolutely necessary (i.e., there is a good chance that the team goal can also be reached without lying) tend to be honest. We also find that subjects who believe that the team goal has already been reached by their team mates tend to over-report production outputs. Across treatments, women are found to be more honest than men. Subjects’ ersonality is not associated with reported production outputs. Our work contributes to previous research on how different compensation schemes affect unethical behavior in organizational settings.
WP 17/01
Our paper estimates the impact of immigration on the sustainability of the Italian public finances using the methodology of Generational Accounting. We take into account socio-economic differences between the main migrants’ communities resident in Italy and we present three possible scenarios to reflect the potential economic degree of integration of foreigners in the Italian territory. Moreover, for each scenario we propose several options for migrants concerning both the length of permanence in Italy and the possible collection of retirement benefits. Our results show that the burden of current fiscal policy reduces as integration of the foreign-born increases. If migrants’ children are economically perfectly integrated, the fiscal gap is reduced from 71.9 to -15.3 percent of GDP.
WP 15/01
The emergence and spread of antimicrobial resistance (AMR) is still an unresolved problem worldwide. The most visible effect of AMR, healthcare-associated infections (HAIs), imposes a substantial financial burden on the healthcare system through exacerbation or prolongation of illness and subsequent in-hospital treatment. The impact of the emergence and spread of AMR, however, is not limited to an increase in the number of HAIs. AMR also impacts patients who do not become infected. As in-hospital resistance patterns change over time, rationale weighting induces decision-makers to adjust their behaviour in order to provide the best possible treatment in a changing environment of resistance. In settings where resistant organisms are prevalent, for instance, physicians routinely change empirical antibiotic therapy in accordance to the relevant resistance indicator, leading to differences in costs, dosing schedules, and/or side-effect profiles.
The effects of such resistance-induced antibiotic substitution effects are highly relevant in intensive care units (ICUs) where treatment failure often has severe consequences. In ICU settings, first line antibiotic therapy is highly standardized and widely empiric. On the other hand, there is a limited number of reserve antibiotics, whose prices and/or side effects are substantially higher than first-line therapy. We hypothesize that a rise in resistance to first line agents increases demand for the respective reserve agents. In order to provide first estimates of these resistance-induced substitution effects, we conducted a panel data regression analysis on monthly antibiotic use and resistance data from 66 ICUs between 2001 and 2012.
We chose an estimation using unit-fixed effects and selected combinations of first line agents and their substituting reserve agent in accordance with an expert opinion-guided and pre-defined set of variables. The investigated reserve antibiotics (Carbapenems, Glycopeptides and Linezolid) represent a large part of all reserve antibiotics and on average 15% of all prescribed antibiotics.
The findings of the three core regressions support the hypothesis that demand for antibiotics significantly increases when lower level resistance rises. For some regressions the lagged effect of resistance is also significant, supporting the conjecture that part of the substitution effect is caused by physicians changing antibiotic choices in empiric treatment by adapting their resistance expectation to new information on resistance prevalence. In contrast, there is no lagged effect related to the occurrence of methicillin-resistant Staphylococcus aureus (MRSA). This may be explained by the availability of rapid testing, which is increasingly used to immediately screen patients for MRSA, commonly resulting in definitive therapy being promptly available.
The results are robust to different specifications of the empirical model, and the findings imply that expectations play an important role in the demand for antibiotics. For policy makers, an important finding may be that the availability and accuracy of information about prevalence of pathogens and resistance rates can increase treatment optimality by allowing physicians to efficiently balance the trade-off of resistance and treatment success.
WP 14/01
Die vorliegende Arbeit befasst sich auf Basis von Routinedaten der AOK-Plus mit Pflegeverläufen von über 60-Jährigen in Deutschland. Unsere Analysen zeigen eine rechtsschiefe Verteilung der Pflegeverläufe für beide Ge-schlechter. Demnach sind 50 Prozent der weiblichen (männlichen) Pflegefälle nach 45 (26) Monaten verstorben, wohingegen die mittlere Verweildauer in der Pflege bei 51,4 (36,6) Monaten liegt. Die mit diesen Pflegverläufen verbundenen Gesamtkosten der Pflege summieren sich nach unseren Berechnungen im Mittel auf einen Barwert von 68.871 (45.233) Euro. Die Analyse der Pflegestufen mittels eines multinominalen logistischen Modells zeigt für die vorliegenden Daten zudem, dass im Beobachtungszeitraum eine Kompression der Pflegeverläufe stattge-funden hat. So wird eine höhere Pflegestufe und somit ein schwerwiegenderer Pflegeverlauf mit zunehmendem Abstand vom Tod sowie zunehmendem Alter für beide Geschlechter unwahrscheinlicher.
WP 12/03
Using a large international data set we analyze whether business cycle forecasters tend to herd or anti-herd. Applying different measures of economic crises, we distinguish between normal economic circumstances and times of crises. We fnd evidence for anti-herding behavior for most industrial economies, i.e. forecasters eliberately stick out their neck with extreme forecasts for strategic reasons. For a set of emerging market economies, by contrast, we find evidence for herding behavior. We relate this finding to the high incidence of economic and financial crises in these countries. A test for herding behavior during economic crises confirms that forecasters tend to herd in times of high forecast uncertainty.
WP 12/02
This paper develops a tractable model of third-degree price discrimination in airline markets that features two types of passengers with different time valuations, carriers in Cournot competition and a congested infrastructure. We find that price discrimination always leads to a loss of social welfare when, in the first stage, the congestion charge is chosen to maximize welfare by incorporating carriers’ behavior in the second stage. We also show that the welfare loss can be small if, in the process of choosing the optimal airport charges, carriers were treated as atomistic.
WP 12/01
This paper analyzes a congested airport that provides aeronautical services to airlines and concessions to retailers and car rental companies. The sum of retail demands inside and outside the airport area is fixed, while an increase of the passenger quantity increases car rental demand. It is shown that an increase of the per passenger retail profit can reduce the private aeronautical charge and the private car rental charge. By contrast, the effect of car rentals on the private aeronautical charge is ambiguous. The welfare-optimal passenger number and aeronautical charge are both independent of retail profit.
WP 11/05
Central bank projections have gained considerable attention for monetary policy modeling. However, less is known about the nature of central bank projections. This letter explores the unbiasedness and rationality of more than 2; 000 growth and in ation projections published by 15 major central banks. The results indicate that central bank projections are in most cases rational and unbiased. Interestingly,
in ation projections are more biased than growth projections.
WP 11/04
In this paper, we contrast more than 6,000 private sector forecasts to projections of the German council of economic experts (Sachverständigenrat). Although the forecasts are submitted simultaneously, we find that the council's real economy forecasts, i.e. their growth, unemployment and fiscal forecasts have a higher forecast accuracy compared to the private sector forecasts. We also document that private sector forecasters deliberately place their real economy forecasts away from the council's projection. This strategic forecasting behavior explains why the private sector performs worse than the council. This result is robust over time but splitting the private sector in different groups reveals that the forecasts of banks compared to research institutes deviate more from the council's forecast.
WP 11/03
Do FOMC members herd?
(2011)
Twice a year FOMC members submit forecasts for growth, unemployment and inflation to be published in the Humphrey-Hawkins Report to Congress. In this paper we use individual FOMC forecasts to assess whether these forecasts exhibit herding behavior, a pattern often found in private sector forecasts. While growth and unemployment forecast do not show herding behavior, the inflation forecasts show strong evidence of anti-herding, i.e. FOMC members intentionally scatter their forecasts around the consensus. Interestingly, anti-herding is more important for nonvoting members than for voters.
WP 11/02
On the international consistency of short-term, medium-term, and long-term oil price forecasts
(2011)
We derive internal consistency restrictions on short-term, mediumterm, and long-term oil price forecasts. We then analyze whether oil price forecasts extracted from the Survey of Professional Forecasters conducted by the European Central Bank satisfy these internal consistency restrictions. We find that neither short-term forecasts are consistent with medium-term forecasts nor that medium-term forecasts are consistent with long-term forecasts. Using a more complex expectation formation structure featuring a distributed lag structure, however, we find stronger evidence of internal consistency of mediumterm forecasts with long-term forecasts.
WP 11/01
We use data from the Consensus Economics Forecast Poll to analyze how current account forecasters form expectations. Our results suggest that forecasts do not satisfy traditional unbiasedness and orthogonality criteria for forecast rationality. In addition, we find anti-herding behavior among forecasters for the Euro area and G7 countries. We also show that the cross-sectional heterogeneity in anti-herding is associated with cross-sectional heterogeneity in forecast accuracy. More specifically, we find some evidence indicating that forecasters who tend to herd provide more accurate forecasts than their colleagues who follow an anti-herding strategy.
WP 10/05
This paper considers a transport network with two firms that operate a parallel service on a hub-to-hub connection and monopoly services on spoke-to-hub connections under increasing returns to scale. We find the following: A symmetric equilibrium cannot occur under independent (non-cooperative) pricing when the number of spoke-to-spoke passengers becomes positive. The effect of cooperative pricing on mark-ups in spoke-to-hub, hub-to-hub and spoke-to-spoke markets (where double marginalization can occur) can be positive or negative. Cooperation can reduce total welfare though hub-to-hub markets are small.
WP 10/04
We used the oil-price forecasts of the 'Survey of Professional Forecasters' published by the European Central Bank to analyze whether oil-price forecasters herd or anti-herd. Oil-price forecasts are consistent with herding (anti-herding) of forecasters if forecasts are biased towards (away from) the consensus forecast. Based on a new empirical test developed by Bernhardt et al. (J. Financ. Econ. 80: 657-675, 2006), we found strong evidence of anti-herding among oil-price forecasters.
WP 10/03
The regulation of rail network access is a key component of the EU policy that aims to strengthen rail markets. Two specific regulations are proposed: (i) a priority for long-distance (freight) services and (ii) a scarcity premium. Based on a congested network with two rail links, numerical simulations demonstrate that total surplus can be greater under the priority rule, which depends on the network charge per train-kilometer. Consumer surplus, on the other hand, is always greater under the priority rule, while fixed network-cost recovery is easier to achieve if a scarcity premium exists.
WP 10/02
A fully unbundled, regulated network firm of unknown efficiency level can undertake unobservable effort to increase the likelihood of low downstream prices, e.g., by facilitating downstream competition. To incentivize such effort, the regulator can use an incentive scheme paying transfers to the firm contingent on realized downstream prices. Alternatively, the regulator can force the firm to sell the following forward contracts: the firm pays the downstream price to the owners of a contract, but receives the expected value of the contracts when selling them to a competitive financial market. We compare the two regulatory tools with respect to regulatory capture: if the regulator can be bribed to suppress information on the underlying state of the world (the basic probability of high downstream prices, or the type of the firm), optimal regulation uses forward contracts only.
WP 10/01
We consider a public and congested airport served by airlines that may have market power, and two types of travelers with different relative values of time. We find that in the absence of passenger-type-based price discrimination by airlines, it can be useful to increase the airport charge so as to protect passengers with a great relative time value from excessive congestion caused by passengers with a low relative time value. As a result, the socially efficient airport charge can be substantially higher than what we learned from the recent literature on congestion pricing with non-atomistic airlines.
WP 09/05
This paper considers a congested airport that provides aeronautical services to airlines and concessions to retailers or, respectively, car rental companies. It is shown that airport retailers exert downward pressure on the private aeronautical charge. On the other hand, the effect of car rentals on the private aeronautical charge is ambiguous. By contrast, the first-best airfare and aeronautical charge are independent of retail profits, while they are positively related to car rentals. Finally, the comparison of private and welfare-oriented airport behavior shows that private behavior can lead to the welfare-optimal outcome when commercial services exist.
WP 09/04
We use oil price forecasts from the Consensus Economic Forecast poll to analyze how forecaster build their expectations. Our findings point into the direction that the extrapolative as well as the regressive expectation formation hypothesis play a role. Standard measures of forecast accuracy reveal forecasters' underperformance relative to the random-walk benchmark. However, it seems that this result might be biased due to peso problems.
WP 09/03
We use the ECB's Survey of Professional Forecaster to show that euro area expectations are consistent with standard macroeconomic building blocks such as the Phillips curve, Okun's law, and the Taylor rule. Moreover, the paper finds that the financial and economic crisis of 2007-2009 did not change the expectation formation process as professional forecasters still adopt macroeconomic building blocks for their forecast. The scepticism that has recently been raised concerning macroeconomic building blocks has apparently not yet affected professional forecasts. On the contrary, we conclude that professional forecasters still have faith in macroeconomic building blocks.
WP 09/02
This paper analyzes the expectation formation process in Denmark, Norway, Sweden and Switzerland. We use the Consensus Economic Forecast poll and show that the forecasts are consistent with Taylor-type rules for three countries but not for Norway. This can be attributed to Norway's long period of an exchange rate targetor. Additionally, we provide evidence that the expected long-term inflation rate is consistent with both the actual average in ation rate and the inflation target for all countries. This implies that the professional forecasters understand the different monetary policy strategies among the four countries indicating that all central banks can be regarded as highly credible.
WP 09/01
WP 08/05
Airlines frequently use code-share agreements allowing each other to market seats on flights operated by partner airlines. Regulation may allow code-share agreements with antitrust immunity (cooperative price setting), or without antitrust immunity, or not at all. I compare relative welfare effects of these regulation regimes for complementary airline networks. A crucial point is that such agreements are used to identify and price discriminate interline passengers. I find that interline passengers always benefit from code-share agreements while non-interline passengers are worse off. Furthermore, I show that the second effect questions the overall usefulness of code-share agreements from a welfare perspective.
WP 08/04
The economic analysis of trade-secret protection has traditionally focused on the interests of companies to conceal information from competitors in order to gain a competitive advantage through trade-secret law. This has neglected cases in which the interest is not in concealing information from competitors, but from trading partners. We investigate the social efficiency effects of trade-secret protection in such cases. Many results from economic theory state that asymmetric information (and therefore also its legal protection) is socially undesirable since it leads to inefficient trade. At the same time, protecting private information might create incentives for socially desirable investments. We model this trade-off in a simple buyer-seller model and
nd that, indeed, trade-secret protection has ambiguous welfare effects. However, a simple, informationally undemanding rule, conditioning the applicability of legal protection on a minimum investment by the informed party to conceal the information, helps to apply trade-secret protection only when it increases welfare. This rationalizes important features of current legal practice.
WP 08/03
"Ex-ante" Taylor rules
(2008)
This paper addresses the question whether financial market participants apply the framework of Taylor-type rules in their forecasts for the G7 countries. Therefore, we use the Consensus Economic Forecast poll providing us a unique data set of inflation, interest and growth rate forecasts for the time period 1989 - 2007. We provide evidence that Taylor-type rules frameworks are present in forecasts of financial markets. Thus, the paper, uses ex-ante data for the estimation of Taylor rules. This is novel, since so far only ex-post (revised) or real-time data have been applied.
WP 08/02
Inflation targeting matters!
(2008)
Proponents of inflation targeting argue that such a strategy directly influences expectation formation processes in financial markets. This paper provides a novel test for the evidence that financial market expectations are formed differently under inflation targeting regimes. Using forecasts for the short-term interest rate, the inflation rate, and output growth for ten emerging markets in Latin-America, central and eastern Europe out of which six economies are inflation targeting economies we estimate expected Taylor-type rules. We find evidence for differences in the expectation formation process in the sense that the well-known Taylor principle fairly holds for countries which adopt an inflation targeting system, while for the other countries it does not.
WP 08/01
Linear demand formulations for price competition in horizontally differentiated products are sometimes used to compare situations where additional varieties become available, e.g. due to market entry of new firms. We derive a consistent demand system to analyze such situations and highlight potential problems that can arise from an inconsistent approach.