Huang's study also revealed that betel-nut growers enjoyed a revenue-to-expense ratio of 2: 1 to 3: 1. That is, for every dollar they spent on costs, they generated two to three dollars in revenues, yielding gross margins of 100-200 %. When you consider that the ratios for rice, mangos, bananas, and pineapples were in the 0.8-1.8 range, growing betel nut was a very attractive proposition.
他也發現，各地區檳榔的益本比（每公頃的產值除以成本），都在 2 到 3 之間，也就是投入 1 元成本，能產生 2-3 元收入，利潤高達 100 % - 200 %，較之稻米、芒果、香蕉、鳳梨的益本比為 0.8 到 1.8 之間，顯示檳榔在全台各地都具有絕對優勢。