官俊榮Geaun, Chun-RongChun-RongGeaun2009-02-032018-06-292009-02-032018-06-2919930095-0696http://ntur.lib.ntu.edu.tw//handle/246246/119215en-USOn the Shiftable Externalitiesjournal article10.1006/jeem.1993.10242-s2.0-38248999469