1.
题目：Sharable inputs, product variety, and city sizes
作者：ABDEL-RAHMAN, H.
期刊：Journal of Regional Science，1990，30, pp. 359–374.
链接：http://onlinelibrary.wiley.com/doi/10.1111/j.1467-9787.1990.tb00105.x/pdf
2.
题目：Productivity variety, Marshallian externalities, and city sizes
作者：ABDEL-RAHMAN, H. and FUJITA, M.
期刊：Journal of Regional Science，1990，30, pp. 165–183.
链接：http://onlinelibrary.wiley.com/doi/10.1111/j.1467-9787.1990.tb00091.x/pdf
3.
题目：Private Government
作者：HELSLEY, R. and STRANGE, W.
期刊：Journal of Public Economics, 1998，69, pp. 281–304.
链接：http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V76-3T52T28-8&_user=1555909&_coverDate=06%2F01%2F1998&_rdoc=1&_fmt=high&_orig=gateway&_origin=gateway&_sort=d&_docanchor=&view=c&_searchStrId=1663724031&_rerunOrigin=scholar.google&_acct=C000053682&_version=1&_urlVersion=0&_userid=1555909&md5=aed0e454bc3284f27697fb7548978d52&searchtype=a
非常感谢！！！