Research
My research abstract can be downloaded here. A summary of
possible future research projects can be downloaded here.
"The
Impact of High School
Leadership on Subsequent Educational Attainment," Job Market
Paper, UNC-CH
Abstract:
Despite a growing
emphasis on leadership skill in
the labor market and higher education, few economists have studied the
development
of and return to leadership skill. This paper uses data from the
National
Education Longitudinal Study of 1988 to estimate
the impact of leadership experience in high school on one of its most
likely
consequences - subsequent educational attainment. Using three
estimation methods to address the
non-random selection of students into leadership positions, I find a
large,
positive impact of high school leadership on subsequent educational
attainment
that is significant in both a statistical and an economic sense.
The most conservative estimates suggest that students
who are leaders in high school complete 0.35 more years of education
than their non-leader peers. High school leadership
is also predicted to increase the probability of attending a
post-secondary
institution by a minimum of 5 percent and to increase the probability
of
holding a college degree by at least 9.5 percent. Interestingly,
similar to many empirical
studies on the return to schooling, the instrumental variables
estimates, which rely on variation in school leadership opportunities,
birth order and twin indicators for identification, are two to three
times the magnitude
of the corresponding
ordinary least squares and propensity score estimates. This
result suggests that failure to control for unobserved heterogeneity
leads to estimates that understate the
true
impact of leadership. An alternative
interpretation put forth by Card (2001) is that the IV estimates
reflect a relatively
high return to leadership by the small group of students who are
affected by
the instruments. I also find evidence of
a differential impact of leadership for students from low versus high
income
households. In terms of total years of
education and post-secondary attendance, high school leadership appears
to
disproportionately benefit students from lower income households, while
with
respect to college graduation, leaders from high income households seem
to
derive at least as great or greater benefit from their leadership
experience
than their low-income peers.
"Revisiting Gruber (2004):
Does growing up in a unilateral divorce regime really lead to negative
later-life outcomes?" Working Paper, Department of Economics, UNC-CH
Abstract:
While divorce
rates peaked in the 1980s, an estimated 33% of first marriages now end
in
divorce or separation within the first 10 years of marriage
and debates over the effects of divorce laws are still very much alive.
While
there is a plethora of research documenting the effect of divorce on
children,
there has been relatively little empirical work seeking to assess the
effect of
the divorce legislation on children
and later life outcomes. This paper
seeks to narrow this gap in the literature by revisiting earlier
results and by
providing updated evidence on the impact of unilateral divorce laws on
child
outcomes. It builds on Jonathon Gruber’s 2004 paper published in the Journal of Labor Economics, which, in
addition to addressing the effect of unilateral divorce on divorce
rates, looks
at the effect of unilateral divorce exposure both as a child and as an
adult on
a variety of outcomes including education, income, marriage and
suicide. In
order to test the robustness of Gruber’s estimates and to assess
whether these trends
persist with the inclusion of more recent data, I first replicate his
results
as precisely as possible. Then, I extend Gruber’s analysis by including
2000
census data which was not available at the time of his publication.
While my replication of Gruber is not perfect,
for the most part, I am reasonably successful in replicating his major
findings
using data from the 1960-1990 time period. In my extension, I find many
of the updated
results found using the 1960-2000 timeframe to be smaller in magnitude
and, in
many instances, much less precise than those estimated with the
original sample.
Updated results still provide evidence of a positive, albeit smaller,
effect of
current unilateral divorce exposure on divorce probabilities.
However,
contrary to Gruber’s findings, I find
little evidence of strong negative effects of youth exposure to
unilateral
divorce on later life outcomes once the 2000 data are included.
"The Impacts of Increasing a
Children's
Stature at Age Two on Pre-Adolescent Child Outcomes in Cebu," (with
Thomas Mroz, Haiyong Liu, Tetyana Shvydko, Slava Zayats, and Linda
Adair), Carolina Population Center, UNC-CH
Abstract:
This
paper uses a sequential dynamic empirical model to
study the longer term impacts of a young child’s height on subsequent
illnesses, entry into school, and height and weight in Cebu,
Philippines. Moving a child from the 10th percentile of the age two
height distribution to the 90th percentile appears to have moderate
impacts on the child’s later physiological and intellectual progress.
Taller children at age two have a ten percentage point lower propensity
to experience a serious illness between the ages of two and seven (37%
versus 47%), and the failure to recognize the endogeneity of the height
at age two underestimates this impact by about a factor of four. While
taller children do appear to be more likely to receive subsequent
immunizations, there appears to be little impact of these immunizations
on reducing the incidence of preventable diseases. The failure to
control for the endogeneity of the child’s height at age two also
overstates by a factor of two its impact on height at age seven, and it
also severely overestimates the impact of age two height on a child’s
weight at age seven. Taller children at age two do appear to have
higher intelligence test scores at age seven, and estimates of this
impact do not appear to be influenced by whether or not one controls
for the endogeneity of height at age two. Higher stature at age two has
a moderate indirect impact on whether a child starts school on time,
with much of this impact operating through the lower incidence of
disease between the ages of two and seven. The estimated indirect
impact would only be half as large if one did not control for the
endogeneity of the child’s height at age two. Taken as a group, these
results suggest that better nutrition and health behaviors before age
two that result in taller children could have important impacts on a
child’s subsequent early intellectual development by reducing the
child’s susceptibility to diseases after age two and before entering
school.
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