We analyze the employment effects of immigration within a model that accounts for several stylized facts of the German labor market. The co-existence of positive wage spans and unemployment is explained by wage rigidities that are simultaneously caused by effciency-wage setting and minimum...

In evolutionary models of indirect reciprocity, reputation mechanisms can stabilize cooperation even in severe cooperation problems like the prisoner's dilemma. Under certain circumstances, conditionally cooperative strategies ("cooperate iff your partner has a good reputation") cannot be...

Sugden (2000) offers an answer to the question of how unrealistic models can be used to explain real-world phenomena: by considering a set of unrealistic models, one may conclude that a result common to these models also holds for a realistic model that, however, is too complex to be analyzed,...

This paper corrects the analysis, presented in Albert and Meckl (1991), of adjustment in a dynamic specific-factors model with endogenous capital stocks, and extends it to a multi-sector setup.

This paper generalizes the analysis in Albert (1989) and Meckl (1990) of adjustment in a dynamic specific-factors model with endogenous capital stocks. Capital reallocation and accumulation are consequences of investment decisions and depreciation. The Investment process is analyzed under a...

The paper considers intersectoral capital mobility in the context of investment theory. Convex costs of adjustment explain imperfect mobility of capital between sectors. Stocks of capital are endogenous; the model essentially is a twosector growth model with Keynesian investment functions. The...

The paper proves a theorem on modified Kuhn-Tucker conditions for the case where a linearly homogenous function is part of the target function. These conditions are necessary and sufficient if target function and constraints satisfy certain re-quirements. Moreover, the envelope theorem can be...

The paper incorporates the efficiency-wage theory into an otherwise standard trade model. The model accounts for sector-specific job rents and involuntary unemployment while preserving decisive properties of the competitive fullemployment approach. The key results from the literature can be...

We investigate how joint production affects the likelihood of factor price equalization (FPE) through trade. Following up on recent contributions by Samuelson (1992) and Jones (1992), we propose to take the relative size of the FPE region of endowment distributions to measure this likelihood. We...

This paper covers those parts of elementary logic that are needed in an introductory course on philosophy of science and the methodology of economics. With this aim in mind, much of the technical material from standard logic courses can be dropped. Specifically, the exposition emphasizes the...