In broad, diversified metropolitan areas, for instance, the regional growth path might benefit from a large variety of urbanization instead of localization economies. 更广泛一点，例如，不同的大都市地区，区域发展途径可能收益于大都市代替地方化经济这一大的变化。
But the aggregated economy effect including urbanization effect and localization effect tends to decline when the cities' population is beyond a certain size. 但是在达到一定城市规模以后，城市人口规模越大，包含地方化经济和城市化经济的聚集经济效应呈现递减趋势。
