We analyze the optimal design of income transfer programs with a special focus on participation taxes and the marginal tax rates in the phase-out region. The analytical framework incorporates labor supply responses along the intensive and extensive margin, where the latter is due to a minimum hours constraint. All results are expressed in reduced form, i.e. in terms of intensive and extensive l...

Contrary to what the literature on the linkage between debt accumulation and hidden economy suggests, this paper advocates that the two relationships, tax-hidden economy size and inflation-hidden economy size, have to be inverse because it is the relative, not the absolute hidden economy size that matters, and it is this that should be the yardstick for empirical work on the subject. It is also...

This study was conducted to compare some nonlinear functions to describe the broiler growth curve of the Cobb500 strain. A flock of fifty one-day-old chicks were randomly selected from a henhouse of 2500 chicks. Our goal was to establish a growth curve using weighting data using mathematical solutions of time-dependent differential functions. In total, six equations were subjected to a statisti...

We present a continuous time model of sovereign debt with the possibility to renegotiate once the terms of the contract. Renegotiations consist of a debt reduction or a debt rescheduling. The model provides closed-form solutions for debt values with endogenous default policy and renegotiations terms. Simulations indicate that both reduction and rescheduling deals allow the lender and the sovere...

What are the macroeconomic effects of tax adjustments in response to large public debt shocks in highly integrated economies? The answer from standard closed-economy models is deceptive, because they underestimate the elasticity of capital tax revenues and ignore crosscountry spillovers of tax changes. Instead, we examine this issue using a two-country model that matches the observed elasticity...

Native poultry is a valuable genetic source with high resistance against diseases providing an important subject for breeding programs. The non-linear mathematical modeling of the growth pattern may partly explain the relationship between requirements and body weight to precise feeding that plays a vital role in the animal enterprises. A study was conducted to compare five non-linear models inc...