Self-selection can bias estimates of treatment effects from randomized experiments if one is interested not merely in the effect of treatment on the treated, but in extrapolating results to the general population. This paper employs the Roy model to study this problem in the context of medical trials. The main insight is that, as the probability of receiving active treatment rises, patients who...

This paper describes an 8-bit data interface circuit between the ISA bus and the digital signal microprocessor TMSC320C31 from Texas Instruments. It has firstly been part of an H.261 video encoder board and then used in other PC boards such as an ISDN, an H.261 video decoder and a QCIF video codec. The C31-ISA interface’s simplicity and functionality are the key for such usage in the Telecommun...

This study adopts a GNP function approach in order to examine the impact of migrant labour on domestic factors of production in the United Kingdom. We also examine the relationship between imports and migrants, which are two different facets of globalisation. We find that an increase in the number of unskilled migrants reduces the wages of unskilled domestic workers. However the quantitative im...

Introduction This paper describes a demonstration program Weapons System Open Architecture (WSOA) funded jointly by AFRL, DARPA, and the Open Systems Joint Task Force. WSOA provides an open systems “bridge“ between legacy embedded mission systems and off-board C31 sources and systems. This “bridge” is used to support internetlike connectivity between command and attack nodes. The foundation of ...

The article studies how takeover defenses influence managerial incentives with respect to long term investments, excess liquidity and the amount of debt relative to equity. The article conducts a cross-sectional regression based on a sample of Danish listed firms, dealing explicitly with the problem of causation between the variables. Takeover defenses adopted by Danish firms mainly consist of ...

Plasmid pTO1 containing the oriT fragment from RK2, the Escherichia coli replication function from pBR322, and a DNA fragment of actinophage phi C31 with the attachment site was transferred from E. coli S17-1 to strains of the genera Actinomadura, Arthrobacter, Micromonospora, Nocardia, Rhodococcus, and to 16 strains of the genus Streptomyces. The frequency of conjugant formation was 1 x 10(-3)...

Central and Eastern Europe countries are in the political and economic transitional process of merging with the European Union. How has foreign investment already transformed these countries’ economic sectors and how will it affect the national economies in terms of capitalization across economic sectors in the near future? Our prime consideration is portfolio investment impact on the dynamics ...

This paper provides an empirical analysis of the association between corruption perception and the willingness to offer bribes, as well as of the influence of different sources of information on corruption perception in the Ukraine. The higher the perceived corruption in an organization, the more probable it is that a person dealing with that organization will offer a bribe, therefore supportin...

Using many valid instrumental variables has the potential to improve efficiency but makes the usual inference procedures inaccurate. We give corrected standard errors, an extension of Bekker (1994) to nonnormal disturbances, that adjust for many instruments. We find that this adujstment is useful in empirical work, simulations, and in the asymptotic theory. Use of the corrected standard errors ...

The importance of protein-lipid interactions [1] in modulating biological activity is becoming increasingly recognized. Among the many facets of this broad area of study, the interaction of different forms of hemoglobin with artificial lipid membranes [2] has been reported to influence both structure and dynamics of membranes C31*] • In the light of the above studies we have used P NMR to inves...