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This paper uses a regression discontinuity design to estimate the effect of home computers on child and adolescent outcomes. We collected survey data from households who participated in a unique government program in Romania which allocated vouchers for the purchase of a home computer to low-income children based on a simple ranking of family income. We show that children in households who received a voucher were substantially more likely to own and use a computer than their counterparts who did not receive a voucher. Our main results indicate that that home computer use has both positive and negative effects on the development of human capital. Children who won a voucher had significantly lower school grades in Math, English and Romanian but significantly higher scores in a test of computer skills and in self-reported measures of computer fluency. There is also evidence that winning a voucher increased cognitive ability, as measured by Raven's Progressive Matrices. We do not find much evidence for an effect on non-cognitive outcomes. Finally, the presence of parental rules regarding computer use and homework appear to mitigate the effects of computer ownership, suggesting that parental monitoring and supervision may be important mediating factors.
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When students are tracked into vocational and academic secondary schools, access to higher education is usually restricted to those who completed an academic track. Postponing such tracking may increase university attendance among disadvantaged students if additional time in school enables them to catch up with their more privileged counterparts. However, if ability and expectations are fairly well set by an early age, postponing tracking during adolescence may not have much effect. This paper exploits an educational reform in Romania to examine the impact of postponing tracking on the proportion of disadvantaged students graduating from university using a regression discontinuity (RD) design. We show that, although students from poor, rural areas and with less educated parents were significantly more likely to finish an academic track and become eligible to apply for university after the reform, this did not translate into an increase in university completion. Our findings indicate that simply postponing tracking, without increasing the slots available in university, is not sufficient to improve access to higher education for disadvantaged groups.
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This paper: i) estimates the effect that going to a better school has on students' academic achievement, and ii) explores whether this intervention induces behavioral responses on the part of children, their parents, and the school system. For the first task, we exploit almost 2,000 regression discontinuity quasi-experiments observed in the context of Romania's high school educational system. For the second, we use data from a specialized survey of children, parents, teachers and principals that we implemented in 59 Romanian towns. The first finding is that students do benefit from access to higher achieving schools and tracks within schools. A second set of results suggests that the stratification of schools by quality in general, and the opportunity to attend a better school in particular, result in significant behavioral responses on the part of teachers, parents, and students. Although we do not expect the magnitude or even the direction of these responses to hold everywhere, their existence has a number of implications for evaluation, particularly since some of them change over time, and some would seem to be relevant only once interventions reach a certain scale.
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Experimental evidence on a range of interventions in developing countries is accumulating rapidly. Is it possible to extrapolate from an experimental evidence base to other locations of policy interest (from "reference" to "target" sites)? And which factors determine the accuracy of such an extrapolation? We investigate applying the Angrist and Evans (1998) natural experiment (the effect of boy-boy or girl-girl as the first two children on incremental fertility and mothers' labor force participation) to data from International IPUMS on 166 country-year censuses. We define the external validity function with extrapolation error depending on covariate differences between reference and target locations, and find that smaller differences in geography, education, calendar year, and mothers' labor force participation lead to lower extrapolation error. As experimental evidence accumulates, out-of-sample extrapolation error does not systematically approach zero if the available evidence base is naïvely extrapolated, but does if the external validity function is used to select the most appropriate reference context for a given target (although absolute error remains meaningful relative to the magnitude of the treatment effect). We also investigate where to locate experiments and the decision problem associated with extrapolating from existing evidence rather than running a new experiment at a target site.
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This paper explores whether conditions during early childhood affect the productivity of later human capital investments. We use Romanian administrative data to ask if the benefit of access to better schools is larger for children who experienced better family environments because their parents had access to abortion. We combine regression discontinuity and differences-in-differences designs to estimate impacts on a high-stakes school-leaving exam. Although we find that access to abortion and access to better schools each have positive impacts, we do not find evidence of significant interactions between these shocks. While these results suggest the absence of dynamic complementarities in human capital formation, survey data suggest that they may also reflect behavioral responses by students and parents.
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This paper explores how asymmetric information between parents and children and direct parental controls can influence children's internet use in Chile. We designed and implemented a set of randomized interventions whereby approximately 7700 parents were sent weekly SMSs messages with (i) specific information about their children's internet use, and/or (ii) encouragement and assistance with the installation of parental control software. We separate the informational content from the cue associated with SMS messages and vary the strength of the cues by randomly assigning whether parents received messages in a predictable or unpredictable fashion. Our analysis yields three main findings. First, we find that messages providing parents with specific information reduce children's internet use by 6-10 percent and help parents mitigate the problem of asymmetric information in the household. Second, we do not find significant impacts from helping parents directly control their children's Internet access with parental control software. Third, the strength or salience of the cue associated with receiving a message has an independent impact on internet use.
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