Following a sample of students who participated in admissions lotteries at eight Early College High Schools (ECs) partnering with 2-year colleges, this study examined the college enrollment and degree completion of students who won admissions lotteries and enrolled in ECs in Grade 9 (i.e., EC students), and assessed the EC impact—in terms of complier average causal effects—on students’ postsecondary education trajectories for up to 6 years after expected high school graduation (i.e., Year 10). The study found that by the end of Year 10, more than half (55.7%) of EC students had enrolled in 4-year colleges and more than a third (34.1%) had completed a bachelor’s degree. Among the subset EC students who had completed an associate degree or certificate during high school, 57.5% had completed a bachelor’s degree by the end of Year 10. Using an instrumental variable approach, our analyses of complier average causal effects revealed that compliers in the treatment group were significantly more likely than their counterparts in the control group to have enrolled in college each year during the 6 years after expected high school graduation and were significantly more likely to have completed a bachelor’s degree each year between 3 and 6 years after expected high school graduation. Taken together, these results demonstrate that rather than diverting students from pursuing 4-year degrees, ECs partnering with 2-year colleges not only improved students’ chance to successfully complete bachelor’s degrees, but also allowed them to do so on a shorter timeline.

在抽样调查了八所早期大学高中（EC）与两年制大学合作参加招生彩票的学生之后，本研究调查了赢得招生彩票并进入9年级EC的学生的大学入学率和学位完成情况（即（EC学生），并评估了EC在预期高中毕业后（即10年级）长达6年的时间（根据合规平均因果影响）对学生中学后教育轨迹的影响。该研究发现，到10年级结束时，超过一半（55.7％）的EC学生已经进入4年制大学就读，而超过三分之一（34.1％）的学生已经完成了学士学位。在高中期间完成副学士学位或证书的部分EC学生中，到10年末已完成学士学位的学生占57.5％。使用工具变量方法，我们对合规者平均因果影响的分析表明，在预期高中毕业后的6年内，治疗组的合规者比对照组的合规者每年更可能进入大学，并且显着在预期的高中毕业后的3至6年之间，每年更有可能获得学士学位。综上所述，这些结果表明，EC与2年制大学合作并没有使学生脱离追求4年制学位的道路，不仅提高了学生成功完成学士学位的机会，而且还使他们能够在较短的时间内完成此工作。我们对遵从者平均因果影响的分析表明，在预期的高中毕业后的6年内，治疗组的遵从者比对照组的遵从者每年更可能进入大学，并且显着更有可能完成预期高中毕业后的每年3到6年之间的学士学位。综上所述，这些结果表明，EC与2年制大学合作并没有使学生脱离追求4年制学位的道路，不仅提高了学生成功完成学士学位的机会，而且还使他们能够在较短的时间内完成此工作。我们对遵从者平均因果影响的分析表明，在预期的高中毕业后的6年内，治疗组的遵从者比对照组的遵从者每年更可能进入大学，并且显着更有可能完成预期高中毕业后的每年3至6年，每年获得学士学位。综上所述，这些结果表明，EC与2年制大学合作并没有使学生脱离追求4年制学位的道路，不仅提高了学生成功完成学士学位的机会，而且还使他们能够在较短的时间内完成此工作。