Empirical work on micro and small firms has focused on developed countries. The little work that exists on developing countries is all too often based on small samples taken from ad hoc questionnaires. The census data we analyze are fairly representative of the structure of small business in...

Entry into an industry often clusters in regions where the industry is already concentrated, which is suggestive of agglomeration economies. Regional public research activities may exert another attracting force on entrants into science-based industries. Empirically these proximity effects are...