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  Working Papers
Understanding Retail Price Differences across U.S. Cities: A Tale of Two Frictions (with J. Wu), 2012.
   
   
  Publications (Papers below are copyrighted by their publishers and are not to be reproduced without the permission of the publishers.)
   
 “Discontinuity of Output Convergence within the U.S.: Why Has the Cource Changed? (with Xiaojun Wang), 2015, Economic Inquiry, 53(1), 49~71. Online annex.
 Does Distance Reflect More Than Transport Costs? (with Horag Choi), 2014, Economics Letters, 125(1), 82~86.
 “Heterogeneous Response of Disaggregate Inflation to Monetary Policy Regime Change: The Role of Price Stickiness (with Roisin O'Sullivan), 2013, Journal of Economic Dynamics and Control, 37(9), 1814~1832.
 “Inflation Targeting and Relative Price Variability: What Difference Does Inflation Targeting Make? (with Young Se Kim and Roisin O'Sullivan), 2011, Southern Economic Journal, 77(4), 934~957.
 “Reconsidering the Relationship between Inflation and Relative Price Variability, 2010, Journal of Money, Credit and Banking, 42(5), 769~798 [lead article]
Bias Reduction in Dynamic Panel Data Models by Common Recursive Mean Adjustment, (with Nelson C. Mark and Donggyu Sul), Oxford Bulletin of Economics and Statistics, 72(5), 567~599.[lead article] Additional simulation results (MC1, MC2, MC3)
 “Is There Any Asymmetry in the Effect of Inflation on Relative Price Variability? (with Young Se Kim), 2010, Economics Letters, 108(2), 233~236.
Robust Estimation for Structural Spurious Regressions and A Hausman−type Cointegration Test, (with Ling Hu and Masao Ogaki), 2008, Journal of Econometrics, 142, 327~351.
How Useful Are Tests for Unit−Root in Distinguishing Unit−Root Processes from Stationary but Nonlinear Processes?, (with Young−Kyu Moh), 2007, The Econometrics Journal, 10, 82~112.
Heterogeneity in the Persistence of Relative Prices: What Do the Japanese Cities Tell Us? (with Kiyoshi Matsubara), 2007, Journal of the Japanese and International Economics, 21, 260~286.
Unbiased Estimation of the Half−Life to PPP Convergence in Panel Data, (with Nelson C. Mark and Donggyu Sul), 2006, Journal of Money, Credit and Banking, 38(4), 921~938.
On the Performance of Popular Unit−Root Tests against Various Nonlinear Dynamic Models: A Simulation Study, (with Young−Kyu Moh), 2006, Communications in Statistics: Simulation and Computation, 35(1), 105~116.
Prewhitening Bias in HAC Estimation, (with Donggyu Sul and P.C.B. Phillips), 2005, Oxford Bulletin of Economics and Statistics, 67(4), 517~546.
A Reexamination of Output Convergence in the U.S. States: Toward Which Level(s) Are They Converging?, 2004, Journal of Regional Science, 44(4), 713~741.
Searching for Evidence of Long-Run PPP from a Post Bretton Woods Panel: Separating the Wheat from the Chaff, 2004, Journal of International Money and Finance, 23(7~8), pp.1159~1186.