The paper investigates factors that determine the average income growth and net migration rates in Swedish municipalities during 1981-99. The main issue is to test the hypothesis that conditional on a set of other possible determinants of regional growth, the growth rate in one municipality is affected by the growth rates in its neighbouring municipalities. The hypothesis of conditional convergence is also tested. A positive correlation is found between net migration rates in neighbouring municipalities, which suggests that net migration tends to 'spillover' to neighbouring municipalities. When it comes to average income growth, the results indicate spatial dependence in the error terms during the 1980s. However, there is no clear evidence in favour of the hypothesis of conditional convergence. Instead, the results predict conditional divergence between municipalities located in the Stockholm region throughout the period and also for municipalities outside the Stockholm region during the 1990s.