Exports, sunk costs and financial restrictions in Argentina during the 1990s

This paper examines firms' export decisions in Argentina during the 1990s. Using a sample of 1600 Argentine industrial firms with information for the years 1992, 1996, 1998 and 2001, we test which factors affect the probability of entering foreign markets. We focus on the role of sunk costs and the access to financial markets as key determinants of firms' export decisions. The estimation of a non-linear binary variable model using export prior experience and explicit sunk costs variables confirms self-selection hypothesis on export markets participation. Results also suggest that firm-specific characteristics are significant to explain export decisions, particularly firm's access to the financial systemsunk costs ; firm's export decisions ; financial restrictions ; Argentina

Stochastic differential equations for non-linear hydrodynamics

We formulate the stochastic differential equations for non-linear hydrodynamic fluctuations. The equations incorporate the random forces through a random stress tensor and random heat flux as in the Landau and Lifshitz theory. However, the equations are non-linear and the random forces are non-Gaussian. We provide explicit expressions for these random quantities in terms of the well-defined increments of the Wienner process.Comment: 11 pages, submitted to Phys. Rev.

Multilevel Approach For Signal Restoration Problems With Toeplitz Matrices

We present a multilevel method for discrete ill-posed problems arising from the discretization of Fredholm integral equations of the first kind. In this method, we use the Haar wavelet transform to define restriction and prolongation operators within a multigrid-type iteration. The choice of the Haar wavelet operator has the advantage of preserving matrix structure, such as Toeplitz, between grids, which can be exploited to obtain faster solvers on each level where an edge-preserving Tikhonov regularization is applied. Finally, we present results that indicate the promise of this approach for restoration of signals and images with edges