An Alternative Instrument for Private School Competition

Empirical studies estimating the effect of private school competition on student outcomes commonly use the share of Catholics in the local population as an instrument for private school competition. However, it has recently been argued that since this instrument is likely to be correlated with unmeasured student characteristics that vary across localities, it cannot be a valid instrument for private school competition. I suggest using instead the local share of Catholics in the population in 1890 and its squared term. I show that these instruments are very strong and are also exogenous to both student achievements and private school competition. These instruments can also be applied to estimate the treatment effect of Catholic schools.School choice, demand for schooling, Catholic share, competition.

Religious Participation versus Shopping: What Makes People Happier?

In this paper, we first explore how an exogenous increase in the opportunity cost of religious participation affects individuals' religious participation and reported happiness using data from the General Social Survey. The exogenous shift in the cost of religious participation is a result of repealing of so-called blue laws which restrict retail activity on Sundays. We find that repealing blue laws causes a significant decline in the level of religious participation of white women and in their happiness. We do not observe any significant decline in reported happiness of other groups whose religious participation was not significantly affected by repeal. We also use repeal as an instrumental variable (IV) for church attendance and provide direct evidence that church attendance has a significant positive effect on happiness, especially for women.religious participation, happiness, blue laws

Religious Pluralism, Religious Market Shares and the Demand for Religious Schooling

We develop a model of school choice in which the demand for religious schooling is driven partly by the desire of parents to limit their children’s exposure to the influences of competing religions. This framework links the literature on the effects of religious market shares on the within-denomination intensity of religious activity with a separate literature relating religious pluralism to the overall level of religious participation. The model predicts that when a religious group’s share of the local population grows, the fraction of that group’s members whose children attend religious schools decreases. In addition, it implies that the overall demand for religious schooling is a positive function of both the local religiosity level and the level of religious pluralism, as measured by a Herfindahl Index. Using both U.S. county-level data and individual data from ECLS-K and NELS:88, we find evidence strongly consistent with the model’s predictions. Our findings also illustrate that failing to control for the local religiosity level in estimating the effect of religious pluralism on religious participation, as is common in previous studies, may lead a researcher to erroneously conclude that pluralism has a negative effect on participation.Religious participation, school choice, religious pluralism

RELIGIOSITY AND PAROCHIAL SCHOOL CHOICE: CAUSE OR EFFECT?

In this paper, we examine the effect of religiosity as measured by attendance at religious services on religious school choice. Particular attention is given to the possibly endogenous relationship between school choice and religiosity. IV probit estimates indicate that religiosity is substantially biased downward in probit estimates of parochial school choice. Data from the National Opinion Research Center’s “General Social Survey” are used.Education, Parochial Schools, Endogeneity

Class Size and the Regression Discontinuity Design: The Case of Public Schools

Using a rich individual-level dataset on secondary public schools in Israel, we find strong evidence for discontinuities in the relationship between enrollment and household characteristics at cutoff points induced by a maximum class size rule. Our findings extend existing work that documents such discontinuities only among private schools (Urquiola and Verhoogen, 2009). These discontinuities violate the assumptions underlying the regression discontinuity design, which are crucial for identification. Consequently, IV estimates of class size effects are likely to be seriously biased. Potential manipulation of the treatment assignment rule by public schools warrants caution in applying a regression discontinuity design to estimate class size effects and indicates that institutional context is crucial for its scope of applicability.regression discontinuity design, class size

(SNP079) Zada Lam interviewed by Dorothy Noble Smith, transcribed by Sharon G. Marston

Records an interview with Zada Lam, who grew up on the Rockingham County side of Swift Run Gap. Describes daily life in the mountains, the means of growing and preserving food and other aspects of the local economy, such as the chestnut harvest and moonshine.https://commons.lib.jmu.edu/snp/1069/thumbnail.jp

Performance of Different Rice Genotypes in the Cold Climatic Region of Malakand Division

An experiment was conducted to evaluate the growth and yield performance of rice genotypes PK3445-3-2, OM5627, IR64, IR8225-9-3-2-3, CIBOGO, Japanese rice and Fakhre Malakand under agro-climatic conditions of Malakand division. The rice genotypes differed significantly with respect to days to 50% flowering, days to maturity, plant height, thousand grain weight and paddy yield (t ha-1) except panicle length and number of tillers/hill. Japanese rice has smallest panicle length (21.23 cm) and OM5627 has longest panicle length (28.00 cm). In genotypes Fakhre Malakand showed higher paddy yield (9.58 t ha-1) followed by PK3445-3-2 and IR64 produced paddy yield 8.66 and 8.51 t ha-1 respectively, while the minimum paddy yield (4.02 t ha-1) was recorded in Japanese rice. Therefore the advanced rice genotype PK3445-3-2 should be further evaluated on farmers’ field for approval as a commercial variety and to be best fit in the prevailing cropping pattern of the region. Keywords: Rice, Genotypes, Cold tolerance

New developments in Stimulated Raman Scattering and applications to plastic particle detection in the environment and human tissue

This thesis deals with an advanced laser-based microscopy technique to detect micrometer-size objects with molecular specificity. Applications are shown from the aquatic environment and from the medical world. The final chapters describe an option to increase the penetration depth through scattering samples and simulation software to help optimize the measurement settings. One of the most prominent materials in modern life is plastic, but this also results in the large-scale production of plastic waste. A portion of this waste reaches the environment and is fragmented into small pieces, called microplastics. Microplastics pollution affects the environment and potentially our health in ways we are only beginning to understand. To study it, we need to have a solid measurement and monitoring platform, based on reliable microplastics detection. Detection of microplastics is difficult due to their small size and heterogeneity and they can be found in different types of matrices in the environment and even in the human body. A label-free microscopy imaging technique, called Stimulated Raman Scattering (SRS) microscopy, is able to create images of small particles, like microplastics, based on their molecular structure. SRS makes use of two synchronized pulsed lasers of different colors, of which the energy difference matches a specific vibration of the target molecule. In this thesis, we used SRS for identifying five polymer types. First, we tested the approach on an artificial mixture of plastic particles, and we identified polyethylene terephthalate particles extracted from nail polish, demonstrating also the thousand‐fold higher speed of mapping compared with conventional Raman. Furthermore, we found 12,000 plastic particles per kilogram dry weight in a Rhine estuary sediment sample. SRS was the fastest microplastics detection method at the time of publication. We concluded that SRS can be an efficient method for monitoring microplastics in the environment and potentially many other matrices of interest. Another application area that was studied with SRS is breast tissue from explanted breast implants. Implant failure occurs in approximately a tenth of patients within 10 years, and even without a major rupture silicone can still leak. We showed how SRS can detect silicone material in breast tissue slices, without additional sample treatment. SRS images revealed the distribution and quantity of silicone material. Twenty-two donor-matched capsules from eleven patients experiencing unilateral capsular contraction complaints were included in a clinical study after bilateral explantation surgery. This method showed the correlation between silicone presence and capsular contraction. Depth penetration of the light into the sample is an issue with any light based technique. We showed the use of a long wavelength SRS microscope system capable of greater depth imaging compared with the more common configuration with shorter wavelengths. It showed an improved depth penetration in polyethylene plastic material, in a silicone test sample with embedded polyethylene microbeads, and into subcutaneous fat tissue. In SRS imaging we have to consider multiple parameters that influence the imaging speed, image quality and the spatial resolution. In order to find the optimized imaging setup, we developed two simulation programs for SRS imaging systems with lock-in amplifier. One simulation program was used to find parameters optimized for either image quality or acquisition time. With the second program we evaluated SRS imaging; the simulations agreed very well with experimental SRS images. The same software was used to simulate multiplexed SRS imaging. of six channels, including the inter-channel crosstalk. These programs will be useful for operating an SRS imaging setup, as well as for designing novel setups