[经济学] 一篇研究ECON PHD退学率学术文章里找来的数据 [复制链接]

cckant
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电梯直达

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发表于 2006-10-29 16:04:36 |只看该作者 |倒序浏览

本帖最后由 cckant 于 2009-3-27 18:53 编辑

Sample:
Information about 586 individuals who matriculated into 27 economics Ph.D. programs
in Fall 2002 is used to estimate first and second year attrition rates. After two years

Sample drops rate
26.5 percent

of the initial cohort had left, equally divided between the first and second years. Attrition varies
widely across individual programs. It is lower among the most highly rated 15 programs, for
students with higher verbal and quantitative GRE scores, and for those on a research
assistantship. Poor academic performance is the most cited reason for withdrawal. About 15
percent transfer to other economics programs because they are dissatisfied with some aspect of
the particular program where they first enrolled.

-------abstract from Wendy et al (2006)

Rank(NRC 1993) 1-6, 7-15, 16-30, 31-48, >48
Number of programs 3 6 7 6 5 27 - -
Number of students 103 149 142 128 64 586 - -
Number of dropouts 15 27 42 50 21 155 - -
First-year attrition rate 0.04c 0.13 0.07 0.23 0.23 0.13 - -
Second-year attrition ratea 0.11 0.06 0.24 0.20 0.13 0.15 - -
Two-year attrition rate 0.15 0.18 0.30 0.39 0.33 0.26 - -
First-year class size (# of students) 37 27 22 25 18 26 0.29 0.23
Faculty-student ratio 0.20 0.29 0.29 0.26 0.32 0.27 0.30 0.23
Terminal master's degree offeredb 0.00 0.14 0.17 0.16 0.41 0.16 0.29 0.26
Core exam pass requiredb 0.77 0.62 0.58 0.73 0.38 0.63 0.27 0.26
Individual advisers assignedb 0.31 0.52 0.35 0.21 0.00 0.32 0.25 0.27
-----------
link to the paper:
http://www.vanderbilt.edu/Econ/wparchive/workpaper/vu06-w08.pdf
[ 本帖最后由 cckant 于 2006-10-29 18:39 编辑 ]

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cckant
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沙发

发表于 2006-10-29 16:05:30 |只看该作者

关于这个sample里那些在读Phd的characteristic

应该是大家比较关心的，分开在楼下贴好了

每列数据对应的sub－sample（子样本？）是楼上的每一个tier的排名（NRC1993），
1-6,7-15,。。。，>48,最后两个数据不用管

Number of students 103 149 142 128 64 586 - -
GRE analytical score 752c 737 716 713 667 722 0.22 0.33
GRE verbal score 575 547 573 577 517 562 0.22 0.32
GRE quantative score 785 782 765 771 738 772 0.20 0.39
U.S. Citizena 0.32 0.26 0.39 0.34 0.38 0.33 0.30 0.25
Malea 0.72 0.66 0.67 0.58 0.67 0.66 0.25 0.29
Median age at entry to program 24.6 24.7 24.6 25.0 26.5 24.8 0.28 0.26
Hold prior graduate degreea 0.38 0.48 0.44 0.47 0.58 0.46 0.25 0.28
Hold undergraduate degree in economicsa 0.73 0.69 0.78 0.65 0.58 0.70 0.26 0.27
Hold undergraduate degree in economics/matha 0.10 0.08 0.04 0.05 0.00 0.06 0.17 0.27
Hold undergraduate degree in matha 0.08 0.03 0.01 0.02 0.03 0.03 0.16 0.27
Median years since undergraduate degree 1.3 2.3 2.2 2.3 3.2 2.3 0.27 0.26

Type of Undergraduate Institution Attendedb
U.S. economics Ph.D.-grantinga 0.33 0.21 0.24 0.21 0.25 0.24 0.26 0.29
U.S. top-50 liberal artsa 0.08 0.05 0.07 0.05 0.02 0.06 0.21 0.27
Other U.S. publica 0.02 0.01 0.06 0.09 0.08 0.05 0.50 0.25
Other U.S. private 0.00 0.03 0.04 0.03 0.08 0.03 0.28 0.26
Top-50 foreign 0.13 0.04 0.02 0.02 0.02 0.04 0.12 0.27
Other foreign 0.45 0.66 0.57 0.59 0.56 0.58 0.25 0.29

Type of Financial Aid During First Year of Study
Fellowshipa 0.93 0.56 0.34 0.27 0.22 0.47 0.24 0.30
Research assistantshipa 0.00 0.01 0.06 0.16 0.02 0.05 0.17 0.27
Teaching assistantshipa 0.00 0.23 0.40 0.42 0.31 0.28 0.28 0.26
No aida 0.07 0.21 0.20 0.15 0.45 0.20 0.36 0.24

牛校生里面，本科有数学major（single or combined)的最高也只有18%，似乎与经验的30%有点出入。呵呵，超级牛校fellowship的比例0.93啊！

[ 本帖最后由 cckant 于 2006-10-29 18:20 编辑 ]

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板凳

发表于 2006-10-29 16:37:12 |只看该作者

这个研究的计量模型（Probit Model）主要预测的是，GRE高的drop得少，其中q最有关系，女的drop得比男的多，美国公民drop得多，有数学本科学位的drop得最少，其次是数学＋经济学位的，非经济非数学本科背景的drop得最多；拿RA的比拿fellowship的drop得少，牛校drop得多些，有共享办公室的drop得少些。－－－当然这些都是ceteris paribus，给定其他因素不变的情况下。

注意，这只是模型的预测结果，相对而言的细微差别。样本是500多个。

[ 本帖最后由 cckant 于 2006-10-29 20:02 编辑 ]

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