4 IZA Discussion Papers
IZA Discussion Paper No. 10125
published in: Civitas – Revista de Ciências Sociais, 2016, 16 (2), 189-217
IZA Discussion Paper No. 6352
substantially revised version pubslished as 'City age and city size' in: European Economic Review, 2014, 71,193-208
IZA Discussion Paper No. 4288
published in: Journal of Mathematical Sociology, 2010, 34 (1), 1-51
IZA Discussion Paper No. 2749
published in: Sociological Methods and Research, 2008, 37 (1), 31-74