Sharp growth estimates for dyadic bb-input T(b)T(b) theorems

The following deals with the $T(b)$ theorems of David, Journ\'e, and Semmes \cite{DJS} considered in a dyadic setting. We find sharp growth estimates for a global and a local dyadic $T(b)$ Theorem. We use multiscale analysis and Haar wavelets in the local case.Comment: 15 page

Migration and Networks: Does Education Matter more than Gender?

This paper looks at the impact of networks on international migration flows to OECD countries. In particular, we look at whether diaspora effects are different across education levels and gender. Using new data allowing to include both dimensions, we are able to analyze the respective impact of networks on the proportion of each category of migrant. Therefore, unlike the preceding literature on macro determinants of international migration, we can identify the respective factors influencing the selection in terms skills and in term of gender. We found that network effects vary by education level but not by gender. Women are also found to be less directly dependent on migration costs unrelated to networks such as distance.migration, human capital, network/diaspora externalities, gender

Implicit Langevin Algorithms for Sampling From Log-concave Densities

For sampling from a log-concave density, we study implicit integrators resulting from $\theta$-method discretization of the overdamped Langevin diffusion stochastic differential equation. Theoretical and algorithmic properties of the resulting sampling methods for $\theta \in [0,1]$ and a range of step sizes are established. Our results generalize and extend prior works in several directions. In particular, for $\theta\ge1/2$, we prove geometric ergodicity and stability of the resulting methods for all step sizes. We show that obtaining subsequent samples amounts to solving a strongly-convex optimization problem, which is readily achievable using one of numerous existing methods. Numerical examples supporting our theoretical analysis are also presented

Networks Effects in International Migration : Education versus Gender

This paper analyses the impact of networks on the structure of international migration flows to OECD countries. In particular, we look at whether diaspora effects are different across education levels and gender. Using new data allowing to include both dimensions, we are able to analyze the respective impact of networks on the proportion of each category of migrant. Therefore, unlike the preceding literature on macro determinants of international migration, we can identify the factors that influence the selection in terms skills and in terms of gender. We find that network effects vary by education level but not by gender.Migration,Human capital, network/diaspora externalities, Gender

Migration-induced Transfers of Norms. The case of Female Political Empowerment

It is recognized that affirmative action, as anti-discriminatory policies whose aim is to benefit an underrepresented group, is a key driver of progress for women. However, the role of migrants in helping female voice from abroad has not been addressed yet. This paper empirically investigates the effect of international migration on the parliamentary participation of women left behind following the brand new strand of literature on ‘transfers of norms’. Panel data from 1960 to 2000 allows us to take into account selection due to women’s eligibility, observed and unobserved heterogeneity. After having controlled for traditional political and non political factors, we show that total international migration to countries with higher female political empowerment significantly increases the female parliamentary shares in sending countriesWomen’s empowerment, Transfers of norms, International Migration, Panel Data, Sample Selection

Asymptotic Stabilizability of Underactuated Hamiltonian Systems With Two Degrees of Freedom

For an underactuated (simple) Hamiltonian system with two degrees of freedom and one degree of underactuation, a rather general condition that ensures its stabilizability, by means of the existence of a (simple) Lyapunov function, was found in a recent paper by D.E. Chang within the context of the energy shaping method. Also, in the same paper, some additional assumptions were presented in order to ensure also asymptotic stabilizability. In this paper we extend these results by showing that above mentioned condition is not only sufficient, but also a necessary one. And, more importantly, we show that no additional assumption is needed to ensure asymptotic stabilizability

Monte Carlo Estimation of the Density of the Sum of Dependent Random Variables

We study an unbiased estimator for the density of a sum of random variables that are simulated from a computer model. A numerical study on examples with copula dependence is conducted where the proposed estimator performs favourably in terms of variance compared to other unbiased estimators. We provide applications and extensions to the estimation of marginal densities in Bayesian statistics and to the estimation of the density of sums of random variables under Gaussian copula dependence

Remittances, Migrants' Education and Immigration Policy: Theory and Evidence from Bilateral Data

We investigate the relationship between remittances and migrants' education both theoretically and empirically, using original bilateral remittance data. At a theoretical level we lay out a model of remittances interacting migrants' human capital with two dimensions of immigration policy: restrictiveness, and selectivity. The model predicts that the relationship between remittances and migrants' education is ambiguous and depends on the immigration policy conducted at destination. The effect of education is more likely to be positive when the immigration policy is more restrictive and less skill-selective. These predictions are then tested empirically using bilateral remittance and migration data and proxy measures for the restrictiveness and selectivity of immigration policies at destination. The results strongly support the theoretical analysis, suggesting that immigration policies determine the sign and magnitude of the relationship between remittances and migrants' education.remittances, migration, brain drain, immigration policy