Unit-Root, Cointegration and Granger Causality Test Results for Export and Growth in OECD Countries

This article is a supplement to Kónya (2004) which investigates the possibility of the export-led growth and growth-driven export hypotheses by testing for Granger causality between the logarithms of real exports and real GDP in twenty-five OECD countries. In Kónya (2004) two complementary testing strategies were applied. First, depending on the time series properties of the data, causality was tested with Wald tests within finite-order vector autoregressive (VAR) models in levels and/or in first-differences. Then, with no need for pre-testing, a modified Wald (MWald) procedure was used in augmented level VAR systems. For brevity, the results of the unit root, cointegration and MWald tests were not reported in Kónya (2004). The aim of the current article is to fill in this gap.unit root, cointegration, causality, economic growth, export, OECD countries

Economic Development, Exchange Rates, and the Structure of Trade

The paper builds a two-country open economy model of incomplete exchange rate pass-through. The paper contributes to the existing literature in two ways. First, incomplete pass-through is the result of price discrimination, and not any assumption about price rigidities. The flexible-price model is capable of delivering empirically plausible magnitudes of pass-through, as long as the exchange rate shock is temporary and not very persistent. Second, the model is also used to shed light on the empirically observed differences in exchange rate pass-through between developing and developed countries. In particular, the discrepancy is explained by the different composition of consumption and trade patterns of rich and poor countries - an assumption to which some empirical support is also presented.Exchange rate pass-through, Economic development, International trade

Directing store flyers to the appropriate audience

Grocery shoppers were questioned about the frequency of purchasing items that were featured in the store's flyers. This measure was used as the dependent variable in a multinomial logit model with the independent variables being various aspects of shopping behaviour, usage of store flyers, age and employment status. Since only one threshold parameter was significant, the four-level dependent variable was then collapsed and a binary model was estimated. This study evidenced that less than half of the respondents looked forward to receiving unsolicited flyers. Most shoppers read the flyers only to be informed of price specials that the store has to offer. The odds ratio of responding to store flyer deals among those who look forward to sales flyers is more than double the odds ratio of those who do not await the flyers, across every category of shopping frequency. Retailers could employ direct marketing to target specific audiences who look forward to receiving store flyers.\u

"International Consumption Patterns among High-income Countries: Evidence from the OECD Data"

The paper analyzes product-level consumption patterns among countries in the OECD in the period from 1985 to 1999. Estimation results find robust evidence of strong convergence in cross-country consumption patterns. The paper also finds a relationship between openness and the cross-country consumption pattern.

Real Effects of Nominal Exchange Rate Shocks

real effects of nominal shocks, endogenous pass-through, two-sector growth model, q-theory, money-in-the-utility

Damping of quasiparticles in a Bose-Einstein condensate coupled to an optical cavity

We present a general theory for calculating the damping rate of elementary density wave excitations in a Bose-Einstein condensate strongly coupled to a single radiation field mode of an optical cavity. Thereby we give a detailed derivation of the huge resonant enhancement in the Beliaev damping of a density wave mode, predicted recently by K\'onya et al., Phys.~Rev.~A 89, 051601(R) (2014). The given density-wave mode constitutes the polariton-like soft mode of the self-organization phase transition. The resonant enhancement takes place, both in the normal and ordered phases, outside the critical region. We show that the large damping rate is accompanied by a significant frequency shift of this polariton mode. Going beyond the Born-Markov approximation and determining the poles of the retarded Green's function of the polariton, we reveal a strong coupling between the polariton and a collective mode in the phonon bath formed by the other density wave modes

Modeling Defects, Shape Evolution, and Programmed Auto-origami in Liquid Crystal Elastomers

Liquid crystal elastomers represent a novel class of programmable shape-transforming materials whose shape change trajectory is encoded in the material's nematic director field. Using three-dimensional nonlinear finite element elastodynamics simulation, we model a variety of different actuation geometries and device designs: thin films containing topological defects, patterns that induce formation of folds and twists, and a bas-relief structure. The inclusion of finite bending energy in the simulation model reveals features of actuation trajectory that may be absent when bending energy is neglected. We examine geometries with a director pattern uniform through the film thickness encoding multiple regions of positive Gaussian curvature. Simulations indicate that heating such a system uniformly produces a disordered state with curved regions emerging randomly in both directions due to the film's up-down symmetry. By contrast, applying a thermal gradient by heating the material first on one side breaks up-down symmetry and results in a deterministic trajectory producing a more ordered final shape. We demonstrate that a folding zone design containing cut-out areas accommodates transverse displacements without warping or buckling; and demonstrate that bas-relief and more complex bent-twisted structures can be assembled by combining simple design motifs.Comment: 11 pages, 7 figure

The Dicke model phase transition in the quantum motion of a Bose-Einstein condensate in an optical cavity

We show that the motion of a laser-driven Bose-Einstein condensate in a high-finesse optical cavity realizes the spin-boson Dicke-model. The quantum phase transition of the Dicke-model from the normal to the superradiant phase corresponds to the self-organization of atoms from the homogeneous into a periodically patterned distribution above a critical driving strength. The fragility of the ground state due to photon measurement induced back action is calculated.Comment: 5 pages, 2 figure