330 Wirtschaft
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- Besteuerung der digitalen Wirtschaft (1)
- Besteuerung digitaler Konzerne (1)
- Beziehungsmarketing (1)
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"Present Bias in Choices over Food and Money: Evidence from a Framed Field Experiment" - this paper presents results from a field experiment investigating dynamically inconsistent time preferences over real food choices and commitment take-up in a natural environment. We implement a longitudinal consumption experiment with a continuous convex budget: College students repeatedly choose and consume lunch menus at their college canteen. We not only allow for a full continuum of healthy or unhealthy foods; we also explicitly design the consumption stage to comply with the consume-on-receipt assumption: utility is created right after handing out the food. The paper also focuses on the implications for effective policy design: It sheds light on consumers' tendency to utilize different types of self-control devices to commit to personal consumption plans. We further compare inconsistent behavior between convex food and money choices to investigate the applicability of monetary reward studies to natural behavior. We find no correlation between time parameters in food vs. money tasks. Utility estimates from food choices suggest that dynamically consistent individuals substitute internal self-control with commitment take-up. Non-committing individuals tend to be present-biased and naive about their inconsistency.
"Dynamic Inconsistencies and Food Waste: Assessing Food Waste from a Behavioral Economics Perspective" - this paper investigates the link between dynamically inconsistent time preferences and individual food consumption and waste behavior. Food waste is conceptualized as unintended consequence of consumption choices along the food consumption chain: Because inconsistent individuals postpone the consumption of healthier food at home, storage time is prolonged and food more likely to be wasted. Capitalizing on a rich data set from a nationally representative survey, the paper constructs targeted measures of time-related food consumption and waste behaviors. In line with the theory, the paper finds that more present-biased individuals waste more food. The mechanism can be empirically supported: Although dynamically inconsistent individuals plan their food consumption, they deviate from their consumption plans more compared to consistent individuals. Deviation behavior is significantly associated with food waste. The paper points to the importance of considering dynamic inconsistencies at different stages of the food consumption process to foster the intended effects of food policies (increase in healthy nutrition) and diminish unintended consequences (increase in food waste).
"Economic Behavior under Containment: How do People Respond to Covid-19 Restrictions?" - this paper investigates the effects of policy interventions on individual decision-making and preferences by looking at a period of unprecedentedly strict regulation: the Covid-19 pandemic. Focusing on Germany, we measure regulatory strictness by calculating a policy stringency index at the federal state level. Capitalizing on exogenous variation in predetermined election cycles across states, we instrument policy stringency with the distance to the next election. Results support a positive relation between weeks to next election and state policy stringency. Leveraging a nationally representative short panel, the paper exploits this exogenous variation in policy stringency across states and over time to assess behavioral changes in different economic domains. The paper finds that government restrictions increase working from home and the provision of childcare at home, while it reduces the number of grocery shopping trips. Containment policies also affect risk preferences and fear of Covid-19: individuals become more risk-averse and afraid of Covid-19 as a consequence of stricter policies. The results are robust against various different model specifications.
This cumulative dissertation investigates the newly emerged phenomenon of customer success management (CSM). CSM has received a significant amount of attention from academics and practitioners alike. However, the body of academic literature is still in its infancy, especially when comparing CSM’s relevance to the field of relationship marketing.
Manuscript 1: Zakrzewski, K., Krause, V., Pfaff, C. & Seidenstricker, S. (2023). Is customer success management a new relationship marketing practice? A review, definition, and future research agenda based on practice theory.
Manuscript 2: Zakrzewski, K., Krause, V., Eberl, D. & Rangarajan, D. (2023). Dynamic & proactive segmentation of post-sale customer relationships in B2B subscription settings: The customer health score.
Manuscript 3: Zakrzewski, K. (2023). Customer success management - closing a capability gap in the customer-focused structure toward customer centricity in B2B service contexts.
The first manuscript adopts a new approach to the investigation of CSM, providing a practice-based definition that distinguishes CSM from other relationship marketing constructs. By utilizing the 3 Ps framework of practice theory (praxis, practices, and practitioners), the definition of CSM as a strategic function was refined. In addition, the second manuscript utilized praxis to develop the customer health score, which can be used as an indicator for the dynamic and proactive segmentation of customers. The third manuscript builds on this functional definition to show how CSM’s organizational embeddedness can help overcome barriers to customer centricity by enabling adaptive organizational capability.
In forecast combination, multiple predictions are linearly combined through the assignment of weights to individual forecast models or forecasters. Various approaches exist for defining the weights, which typically involve determining the number of models to be used for combination (selection), choosing an appropriate weighting function for the forecast scenario (weighting), and using regularization techniques to adjust the calculated weights (shrinkage). The papers listed address the integration of the three approaches into holistic data analytical models.
The first paper develops a two-stage model in which weights are first calculated based on the in-sample error covariances to minimize the error on the available data by combining the individual models. Based on the selection status of a model, the weight of an individual model is then linearly shrunk either toward the mean or toward zero. The selection status is thereby derived apriori from information criteria, where Contribution 1 introduces the selection based on the model’s in-sample accuracy and performance robustness under uncertainty.
Contribution 2 modifies the two-stage model to shrink the forecasters’ weights non-proportionally to the mean or zero. Further, a new information criterion based on forward feature selection is proposed that iteratively selects the forecaster that is expected to achieve the largest increase in accuracy when combined.
Contribution 3 extends the iteration-based information criterion presented in the second contribution to consider diversity gains in addition to accuracy gains when selecting and combining forecasters.
A one-stage model for simultaneous weighting, shrinking, and selection is finally built and evaluated on simulated data in Contribution 4. Instead of requiring a prior selection criterion, the model itself learns which forecasters to shrink to the mean or to zero, while relying on a new sampling procedure to tune the model.
Möglichkeiten zur Besteuerung der digitalen Wirtschaft im Rahmen internationaler Konzernstrukturen
(2023)
Die Konzepte der OECD, EU-Kommission und nationalen DST-Gesetzgeber zur möglichen Besteuerung digitaler Konzerne ist der Ausgangspunkt dieser kumulativen Dissertationsschrift. Die Arbeit umfasst vier einzelne Beiträge, die sich thematisch mit dem neuartigen Konzept der DST nach dem Richtlinienvorschlag der EU-Kommission sowie den nationalen DST-Initiativen innerhalb einiger (ehemals) europäischer Länder normativ und empirisch auseinandersetzen. Ein Teil der Dissertation behandelt ferner das Konzept zur Säule 1 der OECD durch eine Gegenüberstellung mit den DST-Gesetzen. Die Arbeit liefert einen grundlegenden Beitrag zu den Inhalten nationaler DST-Initiativen sowie zu dem Besteuerungskonzept der DST, der steuersystematischen Einordnung, der Betroffenheit sowie der wirtschaftlichen Belastung betroffener Konzerne durch die DST. Die Dissertation umfasst folgende Beiträge:
• Beitrag 1: Graßl, B./Koch, R., Unilaterale Initiativen zur Einführung von Digitalsteuern, Internationales Steuerrecht (IStR) 2019, 873-888.
• Beitrag 2: Graßl, B./Koch, R., Die unilateralen Maßnahmen zur Digitalsteuer – Rechtliche Einordnung und wirtschaftliche Belastung, Steuer und Wirtschaft (StuW) 2020, 293-316.
• Beitrag 3: Graßl, B./Koch, R., Die Auswirkungen von unilateralen Digitalsteuern und der Säule 1 des OECD-Projekts für deutsche Konzerne, Die Unternehmensbesteuerung (Ubg) 2021, 669-689.
• Beitrag 4: Graßl, B., Unilateral Digital Services Taxes in the European Union: Affected firms and Impact on Effective Tax Rates, abrufbar unter: https://ssrn.com/abstract=4262411.
Responsible finance
(2023)
In Anbetracht großer globaler Herausforderungen ist in den letzten Jahren die Frage, wie mit nachhaltiger Geldanlage ein positiver Einfluss auf die Erreichung von Nachhaltigkeitszielen genommen werden kann, immer weiter in den Fokus geraten. Dieses Verständnis hat sich jedoch bei zahlreichen Anbietern von Nachhaltigkeitsfonds noch nicht durchgesetzt und auch die akademische Auseinandersetzung mit nachhaltiger Geldanlage fokussiert sich bisher vor allem auf eine Analyse der finanziellen Auswirkungen dieser Anlageform. Eine weitere Lücke in der akademischen Betrachtung ist eine ausführliche Auseinandersetzung mit der Praxis christlich geprägter Geldanlage.
Beitrag 1 entwickelt die konzeptuelle Grundlage für die weiteren Artikel. Darauf aufbauend wird in Beitrag 2 Literatur zu der Frage analysiert, welche Anlagetechniken bevorzugt werden sollten, um eine Verbesserung der Nachhaltigkeitsleistung der Portfoliounternehmen zu erreichen. Beitrag 3, eine empirische Studie, verwendet die Erkenntnisse der ersten beiden Beiträge, um zu untersuchen, ob und - wenn ja - wie eine Einflussnahme auf die Nachhaltigkeitsleistung der Portfoliounternehmen in den Anlagepolitiken der Anbieter von Nachhaltigkeitsfonds verankert ist. Beitrag 4, ebenfalls eine empirische Studie, beleuchtet die Praxis christlich geprägter Nachhaltigkeitsfonds. Zum einen wird analysiert, welche Filter und Anlagetechniken verwendet werden. Zum anderen wird ein Teil des in Beitrag 3 entwickelte Kategorie-Systems genutzt, um zu ermitteln, wie wichtig die Verbesserung der Nachhaltigkeitsleistung der Portfoliounternehmen für die Fondsanbieter ist.