In this paper we show that findings of an apparently instable popularity function of U.S. presidents, as reported in the previous literature, are likely the consequence of the common use of linear estimation techniques. Employing Penalized Spline Smoothing in the context of Additive Mixed Models...

A large number of articles have analysed 'the one constant' in the economic effects of trade unions, namely that union bargaining reduces employment growth by two to four percentage points per year. Evidence is, however, mostly related to Anglo-Saxon countries. We investigate whether a different...

A large number of articles have analysed ‘the one constant´ in the economic effects of trade unions, namely that union bargaining reduces employment growth by two to four percentage points per year. Evidence is, however, mostly related to Anglo-Saxon countries. We investigate whether a...

An interesting aspect of British research on unions based on the Workplace Industrial/Employment Relations Surveys has been the apparent shift in union impact on establishment performance in the decade of the 1990s compared with the 1980s - and the recent scramble to explain the phenomenon. In...