This chapter has set out in detail the models which are employed below in order to analyse the labour market effects of changes in tax rates and in alterations in the tax structure. The fundamental mechanisms underlying the different approaches have been pointed out. Moreover, vital assumptions have been emphasised. By delineating the models which are used for the subsequent analyses, implicitly statements have also been made about topics or aspects which this study does not cover. For example, all workers and firms are identical ex ante. However, ex-post differences are allowed for, inter alia, if unemploy ment occurs or if some firms have to close down. These restrictions indicate areas of future research insofar as that the findings for homogeneous workers or firms yield an unambiguous proposal for changes in tax rates or the tax structure in order to promote employment. This is because it would be desir able for tax policy to know whether the predicted effects also hold in a world with ex-ante heterogeneity. Furthermore, the product market has not played a role. Therefore, repercussions from labour markets outcomes on product demand - and vice versa - are absent. 55 Moreover, neither the process of capital accumulation, be it physical or human capital, nor substitution pos sibilities between labour and capital in the firms' production function are taken into account. Finally, international competition is not modelled.

The contributors explore the reasons why involuntary unemployment happens when supply equals demand.

This volume seeks to go beyond the microeconomic view of wages as a cost having negative consequences on a given firm, to consider the positive macroeconomic dynamics associated with wages as a major component of aggregate demand.

The introduction of a search and bargaining model to assess the welfare effects of minimum wage changes and to determine an “optimal” minimum wage. In The Minimum Wage and Labor Market Outcomes, Christopher Flinn argues that in assessing the effects of the minimum wage (in the United States and elsewhere), a behavioral framework is invaluable for guiding empirical work and the interpretation of results. Flinn develops a job search and wage bargaining model that is capable of generating labor market outcomes consistent with observed wage and unemployment duration distributions, and also can account for observed changes in employment rates and wages after a minimum wage change. Flinn uses previous studies from the minimum wage literature to demonstrate how his model can be used to rationalize and synthesize the diverse results found in widely varying institutional contexts. He also shows how observed wage distributions from before and after a minimum wage change can be used to determine if the change was welfare-improving. More ambitiously, and perhaps controversially, Flinn proposes the construction and formal estimation of the model using commonly available data; model estimates then enable the researcher to determine directly the welfare effects of observed minimum wage changes. This model can be used to conduct counterfactual policy experiments—even to determine “optimal” minimum wages under a variety of welfare metrics. The development of the model and the econometric theory underlying its estimation are carefully presented so as to enable readers unfamiliar with the econometrics of point process models and dynamic optimization in continuous time to follow the arguments. Although most of the book focuses on the case where only the unemployed search for jobs in a homogeneous labor market environment, later chapters introduce on-the-job search into the model, and explore its implications for minimum wage policy. The book also contains a chapter describing how individual heterogeneity can be introduced into the search, matching, and bargaining framework.

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