Red-giant stars in eccentric binaries

The unparalleled photometric data obtained by NASA’s Kepler Space Telescope has led to improved understanding of red-giant stars and binary stars. We discuss the characterization of known eccentric system, containing a solar-like oscillating red-giant primary component. We also report several new binary systems that are candidates for hosting an oscillating companion. A powerful approach to study binary stars is to combine asteroseimic techniques with light curve fitting. Seismology allows us to deduce the properties of red giants. In addition, by modeling the ellipsoidal modulations we can constrain the parameters of the binary system. An valuable independent source are ground-bases, high-resolution spectrographs

Beneficial and Harmful Agile Practices for Product Quality

There is the widespread belief that Agile neglects the product quality. This lack of understanding how Agile processes assure the quality of the product prevents especially companies from regulated domains from an adoption of Agile. This work aims to identify which Agile Practices contribute towards product quality. Hence, data from a survey study is analyzed to identify Ag-ile Practices which are beneficial or harmful for the quality of the product. From 49 practices that were used in the survey so far, 36 were perceived to have a positive impact on product quality, while four practices were rated as being harmful. The results enrich understanding of how product quality can be achieved in Agile, and support selection of practices to improve quality

Effective action approach to the Leggett's mode in two-band superconductors

We investigate a collective excitation (Leggett's mode) corresponding to small fluctuations of the relative phase of two condensates in two-band superconductor using the effective ``phase only'' action. We consider the possibility of observing Leggett's mode in MgB$_2$ superconductor and conclude that for the known at present values of the two-band model parameters for MgB$_2$ Leggett's mode arises above the two-particle threshold.Comment: 9 pages, RevTeX4; final version published in EPJ

Gender and Banking: Are Women Better Loan Officers?

We analyze gender differences associated with loan officer performance. Using a unique data set for a commercial bank in Albania over the period 1996 to 2006, we find that loans screened and monitored by female loan officers show statistically and economically significant lower default rates than loans handled by male loan officers. This effect comes in addition to a lower default rate of female borrowers and cannot be explained by sample selection, overconfidence of male loan officers or experience differences between female and male loan officers. Our results seem to be driven by differences in monitoring, as loan officers of different gender do not seem to screen borrowers differently based on observable borrower characteristics. This suggests that gender indeed matters in banking.Behavioral banking;loan officers;gender;loan default;monitoring;screening

Sex and Credit: Is There a Gender Bias in Microfinance?

This paper examines the effects of group identity in the credit market. Exploiting the quasirandom assignment of first-time borrowers to loan officers of a large Albanian lender, we test for own-gender bias in the loan officer-borrower match. We find that borrowers pay on average 29 basis points higher interest rates when paired with a loan officer of the other sex. The results indicate the presence of a taste-based rather than a statistical bias, as borrowers’ likelihood of going into arrears is independent of loan officer gender. Ending up with an opposite-sex loan officer also affects demand for credit, with borrowers being 11.5 percent less likely to return for a second loan. The bias is more pronounced when the social distance, as proxied by difference in age between the loan officer and the borrower, increases and when financial market competition declines. This is consistent with theories that predict a tastebased bias to be stronger when the psychological costs of being biased are lower and the discretion in setting interest rates is higher. Taken together, the findings suggest that owngender preferences can have substantial welfare effects.Identity;interest rates;gender;loan officers;microfinance