joint with Ullah A., November 2008
Abstract: This paper defines a new procedure to consistently estimate nonparametric simultaneousequations models that have been explored by Newy et al (1999) and Su and Ullah (2008). The proposed estimation procedure takes into account the additive structure thus achieves efficiencycompared to Su and Ullah (2008), thus further improved the estimator of Newy et al (1999).Our new estimator achieves the oracle e¢ ciency of the oracle estimator defined in this paper,which is infeasible since it is based on knowledge of all components of the model except for theone of interest. Simulation results show that our new estimator outperforms that of Su andUllah (2008) in terms of Mean Squared Error.
This is my third paper, which is my course work for professor Ullah's Nonparametric lectures. I presented the paper on Jan 16, 2009 in the Econometric Colloquia. It was exciting to present my work on the colloquia with many people asking questions. Actually I was sick then, due to the trip back China from Dec 06, 2008 to Jan 08, 2009. I tried my best and it is a satisfactory one, I think, though not the best. After all, it is my first formal presentation.
I feel deeply thankful for Professor Ullah for both his time and directions through the preparation of the work and many helpful comments. Also, I appreciate Professor Su L. at SMU for his kindness to share with me his code.
See the paper at: Tu and Ullah (2008)
http://www.economics.ucr.edu/seminars/winter09/econometrics/index.html
Showing posts with label Research papers. Show all posts
Showing posts with label Research papers. Show all posts
Sunday, March 1, 2009
Shopper City
joint with Arnott R. , Auguest 2008.
Abstract: The bulk of the literature on retail location looks at the topic from theperspective of either the retail firm or the individual shopper. Another branch of theliterature examines the spatial distribution of retail activities within a city or region,drawing on either central place theory or the Lowry model, neither of which incorporateseither markets or agglomeration economies. This paper looks at retail location from theperspective of a general equilibrium model of location and land use, with agglomerationeconomies in retailing. In particular, drawing on the Fujita-Ogawa (1982) model of nonmonocentriccities, it develops a model of retail location, assuming that retail firmsbehave competitively, subject to spatial agglomeration economies. Locations aredistinguished according to the effective variety of retail goods they offer. Shoppers arewilling to pay more for goods at locations with greater effective variety, and in theirchoice of where to shop trade off retail price, product variety, and accessibility to home.Retail prices and land rents at different locations adjust to achieve spatial equilibrium.
This is my second paper, but it comes out first and it is forthcoming in a book in honor of Curtis Eaton for his many contribution in economic theory, especially for his work in spatial competition theory. I feel grateful for Professor Arnott, without whose help I could not make it.
See the paper at: Arnott and Tu (2008)
http://www.economics.ucr.edu/papers/papers08/index.html
Abstract: The bulk of the literature on retail location looks at the topic from theperspective of either the retail firm or the individual shopper. Another branch of theliterature examines the spatial distribution of retail activities within a city or region,drawing on either central place theory or the Lowry model, neither of which incorporateseither markets or agglomeration economies. This paper looks at retail location from theperspective of a general equilibrium model of location and land use, with agglomerationeconomies in retailing. In particular, drawing on the Fujita-Ogawa (1982) model of nonmonocentriccities, it develops a model of retail location, assuming that retail firmsbehave competitively, subject to spatial agglomeration economies. Locations aredistinguished according to the effective variety of retail goods they offer. Shoppers arewilling to pay more for goods at locations with greater effective variety, and in theirchoice of where to shop trade off retail price, product variety, and accessibility to home.Retail prices and land rents at different locations adjust to achieve spatial equilibrium.
This is my second paper, but it comes out first and it is forthcoming in a book in honor of Curtis Eaton for his many contribution in economic theory, especially for his work in spatial competition theory. I feel grateful for Professor Arnott, without whose help I could not make it.
See the paper at: Arnott and Tu (2008)
http://www.economics.ucr.edu/papers/papers08/index.html
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