Firm size and economic concentration: An analysis from a lognormal expansion

This paper studies the distribution of firm size for Colombian economy showing evidence against Gibrat’s law, which assumes a stable lognormal distribution. On contrary, we propose expansion that captures deviations from with additional terms allow better fit at upper tail, is overestimated according to As consequence, concentration indexes should be addressed consistently expansion. Through dynamic panel data approach, also show growth persistent and highly dependent on characteristics, including size, age, leverage −these results neglect law case.