Optimal capital structure: A multi-period programming model for use in financial planning

This paper describes a multi-period, chance constrained mathematical programming model to compute for each period, the firm's optimal debt to equity ratio and the optimal maturity distribution of its debt. The model assumes that the firm's objective is to maximize total value of the firm, and that the firm operates in a world of uncertainty, with corporate income taxes and bankruptcy costs. Finally, the actual coupon rate paid by the firm which is commensurate to the risk of default is endogenously determined by the model.     

The Taxation of Financial Capital under Asymmetric Information and the Tax‐competition Paradox

Information sharing between governments is examined in an optimal‐taxation framework. We introduce a taxonomy of alternative systems of international capital‐income taxation and characterize the choice of tax rates and information exchange. The model reproduces the conclusion found in earlier literature that integration of international caopital markets may lead to the under‐provision of publicly provided goods. However, in contrast to previous results in the literature, under‐provision occurs due to inefficiently coordinated expectations. We show that there exists a second equilibrium with an efficient level of public‐good provision as well as complete and voluntary information exchange between national tax authorities.     

Contests with size effects

In this paper we analyze the structure of contest equilibria with a variable number of individuals. First we analyze a situation where the total prize depends on the number of agents and where every single agent faces opportunity costs of investing in the contest. Second we analyze a situation where the agents face a trade-off between productive and appropriative investments. Here, the number of agents may also influence the productivity of productive investments. It turns out that both types of contests may lead to opposing results concerning the optimal number of individuals depending on the strength of size effects. Whereas in the former case individual utility is u-shaped when the number of agents increases, the opposite holds true for the latter case. We discuss the implications of our findings for the case of anarchic societies and market competition.     

Determinants of business cycles in small scale macroeconomic models: the German case

We identify measures of shocks to total factor productivity and preferences from two real business cycle models and subject them to Granger causality tests to see whether they can be considered exogenous to other plausible sources of the German business cycle. For West German data from 1960.i to 1989.iv we conclude that our measures of shocks are indeed exogenous. This contrasts with similar studies for other countries that question the exogeneity of either productivity or preference shocks. For the period 70.i to 01.iv we find that M3 Granger causes all of our shock measures. We attribute this to the breaks in our time series associated with the German reunification in 1990 and the European Monetary Union in 1999.Earlier versions of this paper circulate as University of Augsburg economics discussion paper no. 213 and Kiel Institute for World Economics working paper no. 1158, respectively.     

Fiscal Policy,Economic Integration and Unemployment

In this paper fiscal policy is examined for an open economy characterized by unemployment due to efficiency wages. We allow for capital and firm mobility in a model where the government chooses the level of wage, source-based capital and profit taxation. The taxing choices of governments are analyzed in scenarios which differ with respect to the constraints imposed on the set of available taxes and on the mobility of firms. As a general result, the welfare loss from labor market imperfections increases when tax bases become internationally mobile, which suggests an increasing relevance of domestic labor-market reforms when tax bases become global.     

Adoption and Impacts of Sustainable Agricultural Practices on Maize Yields and Incomes: Evidence from Rural Zambia

This paper uses a multinomial endogenous treatment effects model and data from a sample of over 800 households and 3,000 plots to assess the determinants and impacts of adoption of sustainable agricultural practices (SAPs) on maize yields and household incomes in rural Zambia. Results show that adoption decisions are driven by household and plot level characteristics and that the adoption of a combination of SAPs raises both maize yields and incomes of smallholder farmers. Adoption of improved maize alone has greater impacts on maize yields, but given the high cost of inorganic fertiliser that limits the profitability of adoption of improved maize, greater household incomes are associated rather with a package involving SAPs such as maize–legume rotation and residue retention.     

Adoption and Ex-post Impacts of Improved Cowpea Varieties on Productivity and Net Returns in Nigeria

Cowpea covers the largest area of any grain legume in Africa and is especially important in West Africa where Nigeria and Niger alone account for over 75% of the total cowpea production in the world. Despite successes of international and national cowpea improvement research in the development and release of several improved varieties, there is limited empirical evidence of adoption and ex-post impacts of improved cowpea. Using a nationally representative survey data from a sample of 1,525 cowpea-growing households in northern Nigeria cultivating over 2,500 cowpea plots, we assess the adoption and impacts of improved cowpea varieties on cowpea yields, net returns and production costs. We apply a control function approach and propensity score matching models to estimate the causal effects of adoption of improved cowpea varieties . Our results show that 38% of the cowpea plots were planted with improved varieties, and cowpea yields, net returns and production costs increase significantly with the adoption of improved cowpea varieties. Adoption of improved cowpea varieties is associated on average with 26% yield gains, 61% increase in net returns and 14% increase in production costs. We also show that farmers who have a lower propensity to adopt improved cowpea varieties also face higher costs of production.