Department of Economics, National Taiwan University國立臺灣大學經濟學系古慧雯HUI-WEN KOO2017-09-082018-06-282017-09-082018-06-281999-03http://ntur.lib.ntu.edu.tw//handle/246246/282193During the Japanese colonial colonial era the early plantation method was one of the most important breakthroughs in sugarcane plantation. Mills offered a premium to farmers that planted early. Some scholars have considered this premium an incentive to farmers to break with the old plantation method. Others have conjectured that sugarcane planted earlier contained more sugar and therefore had a higher value. This paper examines these ideas and offers a different explanation: as a monopsony, the mill could use the premium to practice second-degree price discrimination to enhance its profits.早植法是日治時期甘蔗種植技術的重要突破之一。彼時糖廠普遍設置了早植獎勵的條款, 文獻或視其為推廣新農技的獎勵措施, 或以為早植甘蔗因含糖率較高, 故價值較高。 本文則嘗試說明早植法獎勵具有第二級價格歧視的功能。第二級價格歧視Second-degree price discriminationjournal article