Tóm tắt nội dung: C H A P T E R T W E N T Y - S E V E N Measuring and Analyzing Urban Employment Fluctuations 27.1 INTRODUCTION CITIES ARE NOT JUST LITTLE VERSIONS OF THE NATION National economies experience cyclical behavior; they rise and fall, have booms and recessions. From this, we can make the obvious inference that the geographical components of a national economy