In this empirical study, we test the relationship of Chinese urban productivity and city size. Using over 119 790 firm-level production data cross 28 industries from the Third National Industrial Survey, along with the urban population data of 224 cities, we find strong and prevailing...

A new wavelet-based nonparametric estimator is introduced in an effort to approximate variance functions. The new estimator possesses some superior qualities that are illustrated through its actual performance in some simulations. Citation Copyright 2000 by Kluwer Academic Publishers.