Felix Kübler, Runjie Geng, Existence of Equilibrium in Stochastic Overlapping Generations Economies with Nonconvexities, In: -, No. -, 2018. (Working Paper)
Non-convexities and discrete choices have become important modeling tools in modern macro-economics. Unfortunately, existence of competitive equilibria in the presence of such non-convexities is not always ensured and most results on the existence of equilibrium that can be found in the literature consider a very general model and are not directly applicable to the macro-models used in the literature. In this paper we explain the three main problems one needs to face when proving existence
and give simple sufficient conditions for the existence of competitive equilibria in stochastic OLG models with discrete choices and non-convex preferences. We also consider a version of the model without aggregate uncertainty but with bankruptcy and default and prove existenceof a steady state equilibrium. |
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Regina Hammerschmid, Alexandra Janssen, Crash-o-phobia in Currency Carry Trade Returns, In: Swiss Finance Institute Research Paper, No. 18-64, 2018. (Working Paper)
Currency carry trade returns are on average large and non-normally distributed. While the literature has found different explanations for the existence of carry trade returns, the higher order moments of their return distribution still pose a puzzle. We propose a new model to explain these non-normal properties of currency carry trade returns, by assuming that agents are loss averse and overweight states with low probabilities. This combination of loss aversion and probability weighting is called crash-o-phobia. Using non-linear least squares and risk-neutral state prices implied by currency options, we estimate this crash-o-phobia model to price developed and emerging market currencies. The parameter estimates reveal crash-o-phobic beliefs and preferences with significant differences across currencies. Compared to a model with rational beliefs and CRRA utility, our crash-o-phobia model performs significantly better at explaining the whole distribution of currency carry trade returns. |
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Philipp Müller, Gregor Philipp Reich, Structural Estimation Using Parametric Mathematical Programming with Equilibrium Constraints and Homotopy Path Continuation, In: Econometrics: Econometric & Statistical Methods - General eJournal - CMBO, No. 12, 2019. (Working Paper)
In this paper, we formulate the likelihood function of structural models as a parametric optimization problem, where the model equations enter as constraints, forming a mathematical program with equilibrium constraints (Su and Judd, 2012). We trace the solution to its first-order conditions in dependence on a controlled parameter using homotopy continuation, delivering a relation from the controlled parameter to the corresponding maximum likelihood estimates and their confidence intervals. This enables us to estimate models with identification issues, multiplicity of equilibria, etc. As applications, we first trace the parameter estimates of the bus engine replacement model of Rust (1987), a dynamic discrete choice model, in dependence of the discount factor β. Using relative value iteration, we find that β is well identified and statistically significantly larger than 1. Second, for a simple static binary choice model, we demonstrate how the effects of multiplicity of equilibria and a lack of identification can be mitigated by the tracing method. |
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Jose Parra Moyano, Karl Schmedders, The liberalization of data: a welfare-enhancing information system, In: Working paper series / Department of Economics, No. 2, 2019. (Working Paper)
Users’ data has become a crucial production factor for companies and a necessary asset if they are to compete in the digital ecosystem. However, users’ data is a production factor that is not mobile across companies, since a company can only use the data that its customers—its “users”— generate within its own environment and not the data that its users produce outside of it. This represents a market friction that hinders competition, leads to monopolies, and raises the entry barriers for new companies. Additionally, the users generating and owning the data stored in a company have no control over or overview of their data and cannot monetize it. We model the users’ data as a production factor in the value generation function of companies and introduce the concept of data elasticity of value. Further, and in light of advances in distributed database management, blockchain technology, and data protection regulation, we propose an information system that allows users to sell their data freely to companies other than those within which the data was generated, receiving a self-generated, market-driven basic income. A consequence of this system is that data becomes a mobile production factor, since any company can work with the data that its users generate outside of that company’s own environments. Moreover, our system solves some of the data- ownership problems of the current Internet business model, lowers the entry barriers for new data-intensive companies, and enables new income streams for data-intensive companies, which in the case of online platforms allows them to avoid a dependence on online advertisement to finance their operations. We propose this ecosystem at a conceptual level and simulate the impact of companies having access to higher fractions of their users’ data under different data elasticities of value. We show that the introduction of such a system could theoretically, and under the taken assumptions, more than double the aggregated value of data-intensive companies. |
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Macherel Arthur, Adrien Treccani, Jose Parra Moyano, A 9-dimension grid for the evaluation of central bank digital currencies, In: Working Paper, No. 1, 2018. (Working Paper)
Blockchain technology offers new opportunities for the development of central bank digital currencies (CBDCs). Although discussion on the matter is still in its early stages, researchers and practitioners have proposed possible frameworks via which to explore the potential of this new form of money for central banks and governments. Since blockchain technology is very broad, central banks can conceive of many different blockchain types to sustain CBDC, and the decisions taken by a central bank at a technical level determine the economic possibilities of the resulting monetary system. In other words, the technical attributes of a blockchain have crucial implications for the monetary system that such a blockchain might sustain. In this article, we propose a grid that identifies nine fundamental technical dimensions to be assessed by central banks when establishing a digital currency system based on blockchain technology, and that analyzes the different implications for the central bank as it moves through each of the identified dimensions. Our objective is to offer this grid as a tool to aid in the structured, conceptual, and technical development of national currencies based on blockchain. By way of illustration, we use the grid to analyze three practical scenarios that significantly vary in their implications for the monetary system. |
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Violetta Splitter, Hannah Trittin, Theorizing the ‘social’ in social media:The role of productive dialogs for collaborative knowledge creation, In: SocArXiv Papers, No. w7sd6, 2018. (Working Paper)
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Enrico De Giorgi, Ola Elsayed, Naive Diversification Preferences and their Representation, In: SSRN, No. 2864231, 2016. (Working Paper)
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Enrico De Giorgi, Ola Elsayed, How Elementary is Diversification? A Study of Children’s Portfolio Choice, In: SSRN, No. 3018421, 2017. (Working Paper)
Diversification is a fundamental concept in economics, decision theory, and finance, but the way in which it is implemented in the real world varies greatly. This paper asks how elementary the notion of diversification is by studying whether children apply it as a choice heuristic. We report on results of an experiment that tests whether children diversify in a sequence of hypothetical choice questions and dice-rolling games. Overall, we find that children do exhibit preferences for diversification, both for the sake of variety across consumption goods and for the purpose of mitigating risk when faced with a choice across risky gambles. The naive diversification heuristic, which implies an equal allocation across alternatives, is particularly evident in children's choices when the alternatives are equivalent or unknown. We also investigate the relationship between risk aversion and diversification and find no significant connection between the two. Our results indicate that diversification preferences may have fundamental, developmental roots, which contrasts with the traditional normative view of diversification, in which most economic models take diversification preferences as exogenously given. This may have implications for how one can treat investment anomalies in practice and, in particular, promotes financial literacy training from a young age. |
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Delia Coculescu, Monique Jeanblanc, Some No-Arbitrage Rules under Short-Sales Constraints and Applications to Converging Asset Prices, In: Mathematical Finance, No. n/a, 2017. (Working Paper)
Under short sales prohibitions, no free lunch with vanishing risk (NFLVRS) is known to be equivalent to the existence of an equivalent supermartingale measure for the price processes (Pulido, 2014).We give a necessary condition for the drift of a price process to satsify (NFLVRS). For two given price processes, we introduce the concept of fundamental supermartingale measure, and when a certain condition necessary to the construction of this fundamental supermartingale measure is not fulfilled, we provide the corresponding arbitrage portfolios. The motivation of our study lies in understanding the particular case of converging prices, i.e., two prices that coincide at a bounded random time. |
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Emilia Garcia, Mascia Bedendo, Linus Siming, Cultural Preferences and Firm Financing Choices, In: SSRN, No. 2979247, 2018. (Working Paper)
We document significant differences in the financing structure of small firms with managers of diverse cultural backgrounds. To isolate the effect of culture, we exploit cultural heterogeneity within a geographical area with shared regulations, institutions, and macroeconomic cycles. Our findings suggest that there exist significant cultural differences in the preference towards debt funding and in the use of formal and informal sources of financing (bank loans and trade credit). Our results are robust to alternative explanations based on potential differences in credit constraints and in the distribution of cultural origins across industries, trading partners, and headquarters location. |
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Carmen Tanner, Katharina Gangl, Nicole Witt, The Corporate Ethical Culture Scale (CECS): A New Measure of Ethical Culture, In: SSRN, No. 3186096, 2018. (Working Paper)
How to define and measure ethical culture, how many and which dimensions constitute ethical culture are still unresolved questions in research. The goal of this present paper is to present first steps of the development of a new measurement of ethical culture – the Corporate Ethical Culture Scale (CECS). To address this, we build upon previous instruments, but do also integrate the widely accepted, but so far empirically neglected, distinction of organizational culture; the distinction between compliance-oriented components (emphasizing a culture of control) vs. integrity-oriented components (emphasizing a culture of self-governance and responsibility). Three studies with heterogeneous samples of Swiss and German employees and managers were conducted to create and validate the multidimensional scale. Results of the studies do also suggest that the CECS is capable of predicting unethical working behavior beyond other factors (such as variants of formal ethical regulation). Furthermore, comparisons with other scales do suggest that both compliance- and integrity-based factors are related to duty orientation, but the latter components are more than the former positively associated with perceived autonomous work motivation (in contrast to controlled work motivation). |
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Pablo Koch Medina, Santiago Moreno-Bromberg, Claudia Ravanelli, Mario Sikic, Economic Valuation and Financial Management of an Insurance Firm, In: SSRN, No. 3211146, 2018. (Working Paper)
We use a dynamic framework to address the questions: i) when should an insurance firm pay out dividends and raise (costly) capital and ii) when should an insurance firm take (liquid) investment risk. Financial decisions are made by a manager who strives to maximize firm value and operates in the presence of financial frictions and regulatory capital constraints. We show there is a unique pricing measure that is consistent with market prices and a broad ownership base and use it to compute the risk-adjusted net present value of cash flows to shareholders. We describe the capital and dividend strategies of the firm and show that, from a shareholder perspective, investment in risky assets can be value adding. Risky investments may add value by boosting the value of the option to default or, sometimes, by increasing the firm's franchise value. |
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Michel Habib, Josef Falkinger, Principle or Opportunism? Discretion, Capital, and Incentives, In: CEPR Discussion Paper, No. DP12690, 2018. (Working Paper)
When should shareholders afford a manager the discretion to be opportunistic and when should they constrain him to be principled? We show that discretion is associated with lower powered incentives than is constraint: opportunism may put shareholder capital at risk; shareholder can lessen that risk by lowering the power of managerial incentives, thereby decreasing the manager's incentives to spurn principle for opportunity. We further show that the cost of capital plays a central role in favoring discretion over constraint: the use of capital constitutes an externality; when the cost of capital is low, the externality is of relatively little importance, and the manager is afforded the discretion to be opportunistic. |
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Helmut Max Dietl, Anil Özdemir, Andrew Rendall, The role of physical attractiveness in tennis TV-viewership, In: UZH Business Working Paper Series, No. 376, 2018. (Working Paper)
What is beautiful is good, the ancient Greek lyric poet Sappho wrote over 2,500 years ago. Studies in social sciences, anthropology, psychology, and economics have shown various effects of physical attractiveness. Physically attractive people are hired more often, receive faster promotion, and generally earn more per hour; thus, there is a beauty premium. However, within the context of sports, little is known about consumer preferences concerning athletes’ physical attractiveness. In this study, we analyze 622 live tennis matches from 66 Grand Slam tournaments between 2000 and 2016, examining the relationship between attractiveness, measured by tennis players’ facial symmetry, and TV-viewership. We show that facial symmetry plays a positive role for female matches while there is no significant effect for male matches. The effect persists in several sub-sample regressions and robustness checks. Our results have important implications for managers in the field of sports. TV-broadcasters will likely acknowledge additional revenue potential from advertising due to increased viewership and change their programming accordingly. We contribute to the sports management and economics literature in that we introduce a new method to measure facial symmetry and show that physical attractiveness plays a positive role in tennis TV-viewership. |
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Nicola Branzoli, Fulvia Fringuellotti, The Effect of Bank Monitoring on Loan Repayment, In: -, No. -, 2018. (Working Paper)
We investigate the effect of bank monitoring on loan repayment. Using granular loan-level information from the Italian Credit Register, we build a novel measure of bank monitoring, which is based on bank requests for information on their existing borrowers. We perform a causal analysis, exploiting the Italy Regional Production Tax, IRAP, as a source of exogenus variation in bank monitoring. Our approach is supported by a theoretical model predicting that a decrease in the tax rate improves bank incentives to monitor borrowers. We find that an increase in the number of requests for information, as driven by a 1 percentage point decrease in the IRAP tax rate, reduces the probability of loan distress by 4 percentage points two quarters ahead. |
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Manthos Delis, Fulvia Fringuellotti, Steven Ongena, Credit and Income, In: CEPR Discussion Papers, No. 13468, 2019. (Working Paper)
Using a unique data set of business loan applications to a single bank from individuals who are majority owners of small firms, we study how bank credit origination or denial affects individuals' income. The bank cutoff rule based on the applicants' credit score creates a sharp discontinuity in the decision to originate loans or not. We show that loan origination increases recipients' income five years onward by more than 10% compared to denied applicants. The effect is more pronounced in rural and low-income areas. Our results suggest an important role for banks` credit decisions on the distribution of income. |
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Ugo Albertazzi, Fulvia Fringuellotti, Steven Ongena, Fixed rate versus adjustable rate mortgages: Evidence from Euro area banks, In: Bank of Italy Temi di Discussione, No. 1176, 2018. (Working Paper)
Why do some residential mortgages carry a fixed interest rate and others an adjustable rate? To answer this question we studied unique data from 103 banks belonging to 73 different banking groups across twelve countries in the euro area. To explain the large cross-country and time variations observed, we distinguished between the conditions that determine the local demand for credit and the characteristics of banks that supply credit. As bank funding mostly occurs at the group level, we disentangled these two sets of factors by comparing the outcomes observed for the same banking group across the different countries. Local demand conditions dominate. In particular we find that the share of new loans with a fixed rate is larger when: (1) the historical volatility of inflation is lower, (2) the correlation between unemployment and the short-term interest rate is higher, (3) households' financial literacy is lower, and (4) the use of local mortgages to back covered bonds and of mortgage-backed securities is more widespread. |
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Erich Walter Farkas, Fulvia Fringuellotti, Radu Tunaru, Capital Requirements with Model Risk, In: -, No. -, 2018. (Working Paper)
Model risk needs to be recognized and accounted for in addition to market risk. Uncertainty in risk measures estimates may lead to false security in financial markets. We argue that quantile type risk-measures are at least as good as expected shortfall. We demonstrate how a bank can choose among competing models for measuring market risk and account for model risk. Some BCBS capital requirements formula currently in effect leads to excessive capital buffers even on an unstressed basis. We highlight that the loss to society associated with the inefficient minimum capital requirements calculations is economically substantial over time. |
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Marco Ceccarelli, When Companies Use Their Wiggle Room, Which Investors Care?, In: Swiss Finance Institute Research Paper, No. 18-62, 2018. (Working Paper)
This paper investigates whether certain investors either prefer or dislike holding firms that exploit more of the available regulatory wiggle room and if such a strategy pays off. Exploited wiggle room (WR) is captured by relatively aggressive tax planning, financial reporting, and earnings management practices. I find that long-term, low-turnover investors hold firms with 3% higher exploited WR than those held by short-term, high- turnover investors. After experiencing misconduct that breaches their trust, investors significantly reduce the exploited WR of their holdings. Overall, investors seem to have heterogeneous preferences for WR exploitation and a liking for cautious firms that cannot be explained by a prot maximization motive alone. |
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Manthos Delis, Kathrin De Greiff, Steven Ongena, Being stranded on the carbon bubble? Climate policy risk and the pricing of bank loans, In: SFI Research Paper, No. 8-10, 2018. (Working Paper)
Does neglecting the possibility that fossil fuel reserves become “stranded” result in a "carbon bubble", i.e., an overvaluation of fossil fuel firms? To address this question, we study whether banks price the climate policy risk. We hand collect global data on corporate fossil fuel reserves, match it with syndicated loans, and subsequently compare the loan rate charged to fossil fuel firms-along their climate policy exposure-to non-fossil fuel firms. We find that before 2015 banks did not price climate policy risk. After 2015, however, the risk is priced, especially for firms holding more fossil fuel reserves. We also provide some evidence that "green banks" charge marginally higher loan rates to fossil fuel firms. |
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