Appendix to: "How America Graduated from High School, 1910 to 1960", Construction of State-Level Secondary School Data
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A new state-level series on secondary-school data demonstrates that graduation and enrollment rates increased greatly in the 1920s and 1930s in most regions. An 18-year old male in 1910 had just a 10% chance of having a high school diploma but by the mid-1930s the median 18-year old male was a high
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美国国家经济研究局创建时间：
1994-06-01
