This volume is organized as follows. Chapter one address two questions: how has spatial concentration evolved with growth and development, and what are the efficiency implications of too much or too little spatial concentration? This chapter summarizes the various models that analyze growth by...

Rural-urban migration is playing an increasingly important role in shaping the economic and demographic landscape of Chinese cities. Over the past two decades, China has transformed itself from a relatively immobile society to one in which more than 10 percent of the population are migrants....