SOURCES OF EXPORT EARNINGS INSTABILITY: THE ROLE OF AGRICULTURE
研究了1962-1983年间27个国家20种商品（半数以上为农产品）的出口收入波动，发现某些农业部门不稳定，且没有哪个部门普遍稳定；农业在低收入国家中相对稳定，在高收入国家中则较不稳定。
Previous studies of export earnings for less developed countries have suggested that earnings from primary products — including agriculture — might be more stable than those from industrial goods. Those studies used highly aggregated sectors, so that individual agricultural sectors could not be identified as stable or not. This study measures the export earnings instability of 20 commodity aggregates — more than half of them agricultural — for 27 countries between 1962 and 1983. The results indicate that some agricultural sectors were unstable and that no individual sector was universally stable. Agricultural sectors tended to be among the more stable sectors in low and middle income countries and among the less stable sectors in high income countries.