Central banks' interest rate and international trade in BRIC countries: Agriculture vs machinery industry?

The paper investigates interrelations between the dynamics of national central banks' interest rates and international trade within the BRIC countries. It shows that countries with lower interest rates experience growth of the share of machinery industry exports rather than agriculture and food products, and, on the contrary, in countries with higher interest rates the share of agriculture and food exports increases and the share of machinery industry products declines. The investigation has shown that a relative shift in the interest rate can affect the specialization of countries. --Central banks' interest rate,Exports,Specialization

Central banks' interest rate and international trade in BRIC countries: Agriculture vs machinery industry?

The paper investigates interrelations between the dynamics of national central banks' interest rates and international trade within the BRIC countries. It shows that countries with lower interest rates experience growth of the share of machinery industry exports rather than agriculture and food products, and, on the contrary, in countries with higher interest rates the share of agriculture and food exports increases and the share of machinery industry products declines. The investigation has shown that a relative shift in the interest rate can affect the specialization of countries

The Brans-Dicke-Rastall theory

We formulate a theory combining the principles of a scalar-tensor gravity and Rastall's proposal of a violation of the usual conservation laws. We obtain a scalar-tensor theory with two parameters $\omega$ and $\lambda$, the latter quantifying the violation of the usual conservation laws. The only exact spherically symmetric solution is that of Robinson-Bertotti besides Schwarzschild solution. A PPN analysis reveals that General Relativity results are reproduced when $\lambda = 0$. The cosmological case displays a possibility of deceleration/acceleration or acceleration/deceleration transitions during the matter dominated phase depending on the values of the free parameters.Comment: 17 pages, 3 figure

Radiation from relativistic electrons in "light" and in conventional undulators. Classical and quantum approaches

A photon spectrum of undulator radiation (UR) is calculated in the semi-classical approach. The UR intensity spectrum is determined by an electron trajectory in the undulator neglecting by energy losses for radiation. Using the Planck's law, the UR photon spectrum can be calculated from the classical intensity spectrum both for linear and nonlinear regimes. The radiation of an electron in a field of strong electromagnetic wave (radiation in the "light" undulator) is considered in the quantum electromagnetic frame. Comparison of results obtained by both approaches has been shown that UR spectra in the whole cone coincide with high accuracy for the case x<<1. Characteristics of the collimated UR beam were simulated with taking into account the discrete process of photon emission along an electron trajectory in both kinds of undulators