Optimal discrete hedging of American options using an integrated approach to options with complex embedded decisions

In order to solve the problem of optimal discrete hedging of American options, this paper utilizes an integrated approach in which the writer’s decisions (including hedging decisions) and the holder’s decisions are treated on equal footing. From basic principles expressed in the language of acceptance sets we derive a general pricing and hedging formula and apply it to American options. The result combines the important aspects of the problem into one price. It finds the optimal compromise between risk reduction and transaction costs, i.e. optimally placed rebalancing times. Moreover, it accounts for the interplay between the early exercise and hedging decisions. We then perform a numerical calculation to compare the price of an agent who has exponential preferences and uses our method of optimal hedging against a delta hedger. The results show that the optimal hedging strategy is influenced by the early exercise boundary and that the worst case holder behavior for a sub-optimal hedger significantly deviates from the classical Black–Scholes exercise boundary.     

What happened to single union deals?-a research note

Single union deals were heralded by many as the way for the unions to survive in the 1990s. The importance of such deals has been reduced since then. Here the author examines the decline in the rate of signing and then looking at the factors which have led to this.     

Repayment behavior in peer‐to‐peer microfinancing: Empirical evidence from Kiva

Based on a sample of microloans (to individuals and to groups) that were refinanced through the peer-to-peer microfinancing platform Kiva, we study the determinants of the repayment behavior of micro-entrepreneurs whose loans are available to international charitable lenders. We perform binary regressions and account for influential factors such as the time required for funding or the type of entrepreneurial activity. The screening and monitoring quality of the microfinance institution which selects the borrowers is a main driver of credit default. We find evidence that the loan size, the loan term and the length of a possible grace period influence the probability of default. Moreover, women demonstrate better repayment behavior which is, however, not the case for groups of women.     

Financial market frictions and diversification

We find new facts that relate the evolution of firm scope to the changing frictions in external capital markets over the last three decades. We find that large, diversified publicly traded firms increase their scope during times of high external capital market frictions, such as in the recent Great Recession. Moreover, during these times firms diversify their investment needs and cash flow across industries. We also find similar phenomena outside diversified public firms. Examining the mergers and acquisitions activity of stand-alone and diversified private firms, we uncover similar patterns. In aggregate data, we find that the composition of mergers shifts from focused to diversifying and back with changes in external market conditions. Our evidence is broadly consistent with the notion that firms diversify their scope in response to tightening in external capital markets.     

Psychological barriers in European stock markets: Where are they?

We examine four European stock indices and the prices of eight major German stocks for indications of psychological barriers. The frequency, (expected) returns, intraday volatility and trading volume of these assets are studied contingent on whether the prices lie within a certain range around round numbers. Our results indicate that psychological barriers do not exist on a consistent basis. It seems that some barriers have disappeared after these anomalies have been published. This discovery is consistent with current literature findings about disappearing stock market anomalies.     

The decentralization tradeoff for complementary spillovers

In this article, we examine how centralization and decentralization internalize positive spillovers of local public expenditures when a spill-in from foreign spending is not a substitute, but a complement to domestic spending. Specifically, we assume the production of two district-specific public goods out of two complementary district-specific inputs in a taste-symmetric two-district setting. We compare equilibria in non-cooperative decentralization and cooperative centralization for different spillovers, degrees of complementarity and cost-division rules, and control for the effects of strategic delegation and the feasibility of cross subsidies to the input in the foreign district. We find that centralization welfare-dominates decentralization in most institutional settings and for a wide range of parameters. Yet, we also identify conditions for decentralization to welfare-dominate centralization even in our setup where preferences are homogenous. The setup features three structural novelties: Strategic delegation improves provision and welfare in decentralization. In the absence of cross-district transfers, decentralized provision and welfare increase in spillovers. Welfare in centralization is generally non-monotonic in spillovers.     

Trade union cross‐border alliances within MNCs: disentangling union dynamics at the local,national and international levels

This study identifies three types of workplace union strategy in the development of cross‐border relations within North American and European multinational companies: defensive isolation, risk reduction and proactive solidarity. Qualitative case studies of MNCs with operations in Canada and Mexico indicate that the nature and intensity of participation in cross‐border trade union alliances are shaped by the union dynamic at the local, national and international levels. A combination of greater workplace union power resources, notably discursive capacity, and of strong supportive approach of the national union, notably dedicated resources and space for bottom‐up initiatives, contributes to proactive solidarity strategies towards international union networks. The absence of these factors is associated with risk reduction and defensive isolation strategies.     

Comparing survey data with an official administrative population: assessing sample-selectivity in the IAB Establishment Panel

The IAB Establishment Panel is a large annual establishment survey and serves as a data source for many empirical analyzes, e.g., on labor demand, wages and industrial relations but also for influential policy evaluations. We analyze the selectivity of the IAB Establishment Panel compared with the administrative population of all establishments in Germany to test whether the IAB Establishment Panel is biased towards “good employers”. By design the survey over-samples large, thus high paying and stable establishments. After flexibly controlling for elements of the sampling design, we do not detect any meaningful difference between establishments participating in the survey and the full population regarding key economic performance indicators. If anything, we observe a slight overrepresentation of stable and slow growing establishments. For applied research, the results highlight that “typical” econometric specifications may not be sufficient to control for selectivity.