b'A Social Science Approach to Urban IntensificationUrban intensification is often treated as a strategy for achieving compactness, based upon the notion that land can be used more effectively by increasing the density of all forms of the built environment (Jabareen 2006).In this sense it is the opposite of urban sprawl (Brueckner 1983).However, with a broader application of the urban-intensity concept, it would be associated with synonyms Professorsuch as accentuate, amplify, boost, consolidate, deepen, enhance, heighten, John Zerbymagnify, step up and strengthen, none of which conveys either efficiency or effectiveness.It would therefore seem possible to have intensity without density Professor(Dovey 2014, Porqueddu 2015, Stonor 2018).John ZerbyWe could then, if desired, separate the two concepts, but would that necessarily be desirable?We know that the urban population in many countries has been rising faster than the rural population, and this will probably continue for the foreseeable future, principally as a result of the expectation of persistently higher incomes for urban residents.For example, it can be noted from Figure 1 below that while the ratio of urban to rural per capita disposable income has been falling in the Peoples Republic of China, urban per capita disposable income has been nearly three times greater than that for rural per capita disposable income.Moreover, the rate of decline is relatively slow, so the attraction of urban Fig. 1. Comparison of urban and rural per capita disposable income. Source: https://www.unicef.cn/en/figure-23-capita-disposable-income-urban-rural-1990201719P1-20200229-FOLIO INTRO.indd 24 2020/3/8 11:21:03'