The Impact of Schooling on the Timing of Marriage and Fertility: Evidence from a Change in Compulsory Schooling Law

This paper estimates the impact of schooling on the timing of marriage and early fertility using the 2003 Turkish Demographic and Health Survey and duration analysis methodology. The source of exogenous variation in schooling is the extension of compulsory schooling in Turkey in 1997. The findings indicate that at age 17 –three years after the completion of compulsory schooling –, the proportion of women who are married drops from 15.2 to 10 percent and the proportion of women who have given birth falls from 6.2 to 3.5 percent as a result of the new policy. This implies that the impact of increased schooling on marriage and early fertility persists beyond the completion of compulsory schooling for an important duration. In addition, the delay in the timing of first-birth is driven from the delay in the timing of marriage. After a woman is married, schooling does not have an effect on the duration until her first-birth.Age at marriage, Fertility, Education, Compulsory Schooling, Turkey

The Effect of Compulsory Schooling Laws on Teenage Marriage and Births in Turkey

This paper estimates the impact of the extension of compulsory schooling in Turkey from 5 to 8 years on the marriage and fertility behavior of teenage women in Turkey using the 2008 Turkish Demographic and Health Survey. We find that the new education policy reduces the probability of marriage and giving birth for teenage women substantially: the probability of marriage by age 16 is reduced by 44 percent and the probability of giving birth by age 17 falls by 36 percent. The effects of the education policy on the time until marriage and first-birth persist beyond the completion of compulsory schooling. In addition, we find that the delay in the time until first-birth is driven by the delay in the time until marriage. After a woman is married, the rise in compulsory schooling years does not have an effect on the duration until her first-birth. Finally, we find that the education policy was more effective in reducing early marriage than a change in the Civil Code aimed for this purpose.compulsory schooling, education, fertility, age at marriage

Extended dynamical symmetries of Landau levels in higher dimensions

Continuum models for time-reversal (TR) invariant topological insulators (Tis) in d >= 3 dimensions are provided by harmonic oscillators coupled to certain SO(d) gauge fields. These models are equivalent to the presence of spin-orbit (SO) interaction in the oscillator Hamiltonians at a critical coupling strength (equivalent to the harmonic oscillator frequency) and leads to flat Landau Level (LL) spectra and therefore to infinite degeneracy of either the positive or the negative helicity states depending on the sign of the SO coupling. Generalizing the results of [1] to d >= 4, we construct vector operators commuting with these Hamiltonians and show that SO(d, 2) emerges as the non-compact extended dynamical symmetry. Focusing on the model in four dimensions, we demonstrate that the infinite degeneracy of the flat spectra can be fully explained in terms of the discrete unitary representations of SO(4,2), i.e. the doubletons. The degeneracy in the opposite helicity branch is finite, but can still be explained exploiting the complex conjugate doubleton representations. Subsequently, the analysis is generalized to d-dimensions, distinguishing the cases of odd and even d. We also determine the spectrum generating algebra in these models and briefly comment on the algebraic organization of the LL states w.r.t. an underlying "deformed" AdS geometry as well as on the organization of the surface states under open boundary conditions in view of our results

The effect of compulsory schooling laws on teenage marriage and births in Turkey

This paper estimates the impact of the extension of compulsory schooling in Turkey from 5 to 8 years on the marriage and fertility behavior of teenage women in Turkey using the 2008 Turkish Demographic and Health Survey. We find that the new education policy reduces the probability of marriage and giving birth for teenage women substantially: the probability of marriage by age 16 is reduced by 44 percent and the probability of giving birth by age 17 falls by 36 percent. The effects of the education policy on the time until marriage and firstbirth persist beyond the completion of compulsory schooling. In addition, we find that the delay in the time until first-birth is driven by the delay in the time until marriage. After a woman is married, the rise in compulsory schooling years does not have an effect on the duration until her first-birth. Finally, we find that the education policy was more effective in reducing early marriage than a change in the Civil Code aimed for this purpose

The effect of compulsory schooling laws on teenage marriage and births in Turkey

This paper estimates the impact of the extension of compulsory schooling in Turkey from 5 to 8 years on the marriage and fertility behavior of teenage women in Turkey using the 2008 Turkish Demographic and Health Survey. We find that the new education policy reduces the probability of marriage and giving birth for teenage women substantially: the probability of marriage by age 16 is reduced by 44 percent and the probability of giving birth by age 17 falls by 36 percent. The effects of the education policy on the time until marriage and first-birth persist beyond the completion of compulsory schooling. In addition, we find that the delay in the time until first-birth is driven by the delay in the time until marriage. After a woman is married, the rise in compulsory schooling years does not have an effect on the duration until her first-birth. Finally, we find that the education policy was more effective in reducing early marriage than a change in the Civil Code aimed for this purpose

Does Longer Compulsory Education Equalize Schooling by Gender and Rural/Urban Residence?

This study examines the effects of the extension of compulsory schooling from 5 to 8 years in Turkey in 1997 - which involved substantial investment in school infrastructure - on schooling outcomes and, in particular, on the equality of these outcomes between men and women, and urban and rural residents using the Turkish Demographic and Health Surveys. This policy is peculiar because it also changes the sheepskin effects (signaling effects) of schooling, through its redefinition of the schooling tiers. The policy is also interesting due to its large spillover effects on post-compulsory schooling as well as its remarkable overall effect; for instance, we find that the completed years of schooling by age 17 increases by 1.5 years for rural women. The policy equalizes the educational attainment of urban and rural children substantially. The urban-rural gap in the completed years of schooling at age 17 falls by 0.5 years for men and by 0.7 to 0.8 years for women. However, there is no evidence of a narrowing gender gap with the policy. On the contrary, the gender gap in urban areas in post-compulsory schooling widens. The findings suggest that stronger sheepskin effects for men, resulting from their much higher labor-force participation rate, bring about this widening gender gap

Integrable and superintegrable systems with spin in three-dimensional Euclidean space

A systematic search for superintegrable quantum Hamiltonians describing the interaction between two particles with spin 0 and 1/2, is performed. We restrict to integrals of motion that are first-order (matrix) polynomials in the components of linear momentum. Several such systems are found and for one non-trivial example we show how superintegrability leads to exact solvability: we obtain exact (nonperturbative) bound state energy formulas and exact expressions for the wave functions in terms of products of Laguerre and Jacobi polynomials.Comment: 23 page

Composition and Antibacterial Activities of Marine Sponges From Different Seagrass Ecosystems in Kepulauan Seribu Waters, Jakarta

A seagrass ecosystem has high productivity that supports many species of associated invertebrates, including sponges. However, seagrass beds with different habitat condition, including seagrass species composition and architectural morphotypes could affect the associative sponge in the ecosystem. This study is aimed to find out about sponge species composition in different seagrass beds. The observation was conducted in two seagrass ecosystems at the east (site 1) and at the southeast (site 2) of Pramuka Island, Kepulauan Seribu, near Jakarta Bay, Indonesia. The Belt Transect was used to assess the density of sponges on the seagrass ecosystem, which was placed parallel to the coastline. The sponges species has higher number at the east than the southeast, with both sites was dominated by Spirastrella sp. and Agelas conifera. Correspondence Analysis (CA) results showed that sponges community has close interaction with seagrass abundance especially Cymodocea rotundata and Enhalus acoroides and architectural characteristic (patchily or continues meadows). Antibacterial assay of sponges tissue showed that only 7 sponge species has activity against targeting bacteria. The CA results also showed that sponge antibacterial activity was not correlated with seagrass species, with low bactericide and bacteriastatic activities. The implication of this result showed that sponges community can grow up at seagrass ecosystem eventhough their potential secondary metabolite activities is very low probably due to lack of stimulus mechanisms in the environment

Does longer compulsory education equalize educational attainment by gender, ethnicity, and socioeconomic background?

This study examines the effects of the extension of compulsory schooling from 5 to 8 years in Turkey—which substantially increased the grade completion rates not only during the new compulsory years but also during the high school years—on the equality of educational outcomes among various subpopulations. While longer compulsory schooling decreases the educational gap for most subgroups—in particular, the gender gap in rural areas, the ethnic gap among men in both urban and rural areas, and the ethnic gap among women in urban areas; at the same time, it increases the gender gap in urban areas as well as the ethnic gap among women in rural areas. For instance, the gap in the 8th grade completion rate between ethnic Turkish and Kurdish women in rural areas increases from 22.5 to 44.6 percentage points for the 1989 birth-cohort. These findings suggest that the differences among subpopulations in the change in schooling costs (both monetary and psychic) during the new compulsory schooling years, in the costs of non-compliance with the policy, in labor force participation, and in the drop-out behavior in earlier grades are the key underlying factors

The Impact of Schooling on the Timing of Marriage and Fertility: Evidence from a Change in Compulsory Schooling Law

This paper estimates the impact of schooling on the timing of marriage and early fertility using the 2003 Turkish Demographic and Health Survey and duration analysis methodology. The source of exogenous variation in schooling is the extension of compulsory schooling in Turkey in 1997. The findings indicate that at age 17 –three years after the completion of compulsory schooling –, the proportion of women who are married drops from 15.2 to 10 percent and the proportion of women who have given birth falls from 6.2 to 3.5 percent as a result of the new policy. This implies that the impact of increased schooling on marriage and early fertility persists beyond the completion of compulsory schooling for an important duration. In addition, the delay in the timing of first-birth is driven from the delay in the timing of marriage. After a woman is married, schooling does not have an effect on the duration until her first-birth