Book excerpt: The Research Summaries in the March 2013 Research Bulletin discuss "Trade Finance and Its Role in the Great Trade Collapse" (JaeBin Ahn) and "Sovereign Debt: How to Track Who Is Buying and Selling It" (Serkan Arslanalp and Takahiro Tsuda). The Q&A looks at "Seven Questions on the Implications of Global Supply Chains for Real Effective Exchange Rates" (Rudolfs Bems). Readers can also find in this issue a listing of recent IMF Working Papers, Staff Discussion Notes, and Recommended Readings from IMF Publications. The Bulletin also includes a call for papers for a research conference and information on free access to the IMF Economic Review in April.