Perhaps the best way to summarize the empirical results is to classify the hypotheses into three groups: those which can be readily accepted because they are supported in all tests; those which can be readily rejected because no test results support them; and those upon which one should remain...

The results of the previous section, estimates of a three equation model from 23 observations, must obviously be regarded as tentative. The consistent positive relationship between number of interest groups and size of government observed with changing sets of included independent variables,...

The purpose of the present paper has been to examine one particular set of implications of the Olson theory: the effect on trade patterns of the accumulation of interest groups and organizational rigidities. The results of three different tests were consistent with the predictions of that...

The role of interest groups in the political process has been the subject of much analysis in both political science and economics. However, few studies have examined directly the factors which influence the variation in interest group formation across industrial sectors and between countries....