Plants' entry and exit behaviour in Swedish municipalities are studied with
in a fixed-effect, integer-valued autoregressive model. Based on eight indu
strial sectors, 1985-1993, and all municipalities, models are estimated by
a generalized method of moment estimator. Influences on entry and exit are
systematic and spatially as well as temporally variable. Responses to expla
natory variables differ between sectors. Average income, local unemployment
and higher education are found to be important determinants of both entry
and exit across sectors.