<p><font size="4">1</font></p><font size="4">文献名：Maximum or Minimum Differentiation? Location Patterns of Retail Outlets </font><p></p><font size="4">作者：Janet S. Netz, Beck A. Taylor. </font><p></p><p><font size="4">期刊：Review of Economics and Statistics (2002).84:1, 162-175</font></p><p><font size="4">电子链接：<a href="http://www.mitpressjournals.org/doi/abs/10.1162/003465302317331991">http://www.mitpressjournals.org/doi/abs/10.1162/003465302317331991</a></font></p><p><font size="4"></font></p><p><font size="4">&nbsp;2</font></p><font size="4">文献名：On Optimum Population: A Reply </font><p></p><font size="4">作者：Manuel Gottlieb </font><p></p><p><font size="4">期刊： Journal of Political Economy, 1946, vol. 54</font></p><p><font size="4">电子链接： <a href="http://www.journals.uchicago.edu/doi/abs/10.1086/256382">http://www.journals.uchicago.edu/doi/abs/10.1086/256382</a></font></p><p><font size="4"></font></p><p><font size="4">3</font></p><font size="4">文献名：Notes on the Theory of Duopoly </font><p></p><font size="4">作者：George J. Stigler </font><p></p><p><font size="4">期刊： Journal of Political Economy, 1934, vol. 48, pages 521</font></p><p><font size="4">电子链接： <a href="http://www.journals.uchicago.edu/doi/abs/10.1086/255586">http://www.journals.uchicago.edu/doi/abs/10.1086/255586</a></font></p><p><font size="4"></font></p><font size="4">4 </font><p></p><font size="4">文献名：Monopolistic Competition and the Use and Price of Urban Land Service </font><p></p><font size="4">作者：Joseph J. Spengler </font><p></p><p><font size="4">期刊： Journal of Political Economy, 1946, vol. 54, pages 385</font></p><p><font size="4">电子链接：<a href="http://www.journals.uchicago.edu/doi/abs/10.1086/256399">http://www.journals.uchicago.edu/doi/abs/10.1086/256399</a></font></p><p></p><p><font size="4">&nbsp;</font></p>

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