Effect of mitomycin C on the size of antrostomy after endoscopic sinus surgery.

Objectives: Mitomycin C (MMC) is an antibiotic-antineoplastic agent that decreases fibroblast proliferation and scar formation. We aimed to evaluate the effect of MMC on the size of antrostomy and the mucociliary clearance rate.

Methods: We selected 20 patients with chronic sinusitis on both sides.

Urban to urban migration: Soviet patterns and post-Soviet implications.

"In spite of extensive literature on migration in the Soviet Union, we know little about household-level decisions. This study specifies and estimates those variables important to understanding the migration decision. Using data from the Soviet Interview Project (SIP), we examine the forces influencing the decision to migrate or not to migrate, and in addition, for those who did migrate, the forces influencing the locational choices made.

Labor market effects of immigration in the United States and Europe: substitution vs. complementarity.

"This paper examines the impact of immigrants on the income of various groups of resident workers in the United States and Europe. Our approach features the use of a production technology incorporating education, experience, and unskilled labor as inputs..

Use of zona drilling for safe and effective biopsy of murine oocytes and embryos.

With the mouse as a model, we have used zona drilling to devise procedures for safe removal of the first polar body or one or more blastomeres from cleaving embryos. These methods require minimal disruption of the zona pellucida and little or no direct contact between microtools and the materials to be biopsied. Of 175 eggs subjected to the polar body biopsy procedure, 1 was killed, and 165/174 survivors were fertilized (94.

Subsidy policies with capital accumulation: maintaining employment levels.

The authors study a dual economy model of growth and unemployment in the presence of Harris-Todaro type labor migration. The model is a discrete time model of economic growth with a given population but endogenous migration of labor. The economy tries to reach development in the quickest possible time while not allowing unemployment to rise above a socially acceptable level.