#  Data 

 



- [**"Estimating Trade Flows: Trading Partners and Trading Volumes,"** ](/publications/estimating-trade-flows-trading-partners-and-trading-volumes)**by Elhanan Helpman, Marc Melitz, Yona Rubinstein,** ***Quarterly Journal of Economics*** **123: 441-487, 2008.**
- [**"International R&D Spillovers and Institutions"** ](/publications/international-rd-spillovers-and-institutions)**by D. Coe, E. Helpman, and A. Hoffmaister,** ***European Economic Review*** **53: 723-741, 2009.**
- [**"International R&D Spillovers"** ](/publications/international-rd-spillovers)**by D. Coe and E. Helpman,** ***European Economic Review*** **39: 859-887, 1995.**