We propose two indexes to measure the agglomeration forces acting within and between different regions. Unlike the … existing measures of agglomeration, our model-based indexes allow for simultaneous treatment of both aspects. Local plant … parameters is dealt with, including the problem of data censoring. The statistical properties of standard agglomeration indexes …

Two main hypotheses are usually put forward to explain the productivity advantages of larger cities: agglomeration … asymmetric trade and entry costs and different spatial scale at which agglomeration and selection may work are properly taken … into account. The empirical findings confirm that agglomeration effects play a major role. However, they also show a …