Gibrat's Law for (All) Cities: Reply
反驳了Levy(2009)对城市规模分布上尾拟合的质疑,指出其方法缺乏依据,并论证吉布拉定律成立,即城市规模呈比例增长,形成对数正态分布。
This reply refutes the objection raised by Levy (2009) about the fit of the upper tail of the city size distribution in Eeckhout (2004). I show that the method on which his conclusion is based is unsubstantiated. The visual interpretation of the fit on log-log plots is misleading. In addition, the methodology used to estimate a truncated subsample of the distribution while testing its significance against a distribution with prespecified parameters is ill-founded. The main conclusion is that Gibrat's law holds: city sizes follow proportionate growth, thus giving rise to a lognormal size distribution, tail included.