This dissertation focuses on the study of urban development. The first chapter explores whether agglomerative forces can explain the location decisions of new manufacturing firms in the face of declining manufacturing activity in the United States over the time period 2004-2011. I find that labor market pooling and input-output linkages have the largest effects, positively influencing firm location. Moreover, corporate taxes discourage firm activity but the effects are weaker in more geographically concentrated industries. I then investigate whether negative macro shocks would change how firm location decisions respond to agglomeration forces. The results indicate that the workings of agglomeration economies have become more pronounced afte...