Yan Heng, NDSU graduate student of agribusiness and applied economics, recently presented a paper at the Missouri Valley Economic Association annual meeting in St. Louis. Hengs paper, Accounting for Greenhouse Gas Emissions in Trucking Production, was co-written with Siew Hoon Lim, assistant professor of economics. Heng also attended sessions on applied macroeconomics, global economics, health economics and the economics of water topics she hopes to eventually apply to her own work. Heng is pursuing a masters degree.