On December 1, 2017, the 5th Joint Workshop between Chulalongkorn University and Osaka University was held at the Faculty of Economics, Chulalongkong University. Professor Erika Seki (GSE), Associate Professor Masato Nishiwaki (GSE), and Prof. Ryo Horii (ISER) from Osaka University presented their research. There were considerable exchanges of information and opinions related to various economic fields. Also, Associate Dean Mototsugu Fukushige (GSE) and Prof. Masaru Sasaki (GSE) attended a meeting and discussed further exchanges between faculty members and graduate students for the next couple of years. We look forward to hosting our 6th workshop at Osaka University next year.