Every city has an "optimal scale", which depends on the mutual comparison of the positive and negative effects of city size. In reality, the positive utility is mainly the agglomeration utility of the urban economy, and the negative utility includes traffic congestion and environmental pollution. High housing prices, inadequate infrastructure, etc. While economic agglomeration will increase labor productivity, it will also increase urban land and housing prices. At this time, the production costs of enterprises and the cost of living of residents will rise. Crowded cities, Pollution and crime issues can also offset the benefits of urban expansion. Businesses and residents will only stay in a city if the positive effects of a city outweigh its cost of production or living. What does the following statement inconsistent with the text? ['The "optimal size" of a city depends on the balance of positive and negative effects.', 'The negative effect of a big city is often greater than its positive effect.', 'Issues such as congestion, pollution and crime can affect urban expansion.', 'Economic agglomeration utility is an important factor in determining city size.']