This paper uses flight-level data and measures of Internet penetration in U.S. metropolitan statistical areas between 1997 and 2007 to study the relationship between Internet access and flight on-time performance, which represents a measure of flight quality. We find that on-time performance is substantially worse for flights in which passengers originated in areas with greater Internet access....

Antibodies are responsible for antigen recognition in vertebrate organisms. Practically any molecule can be bound by antibodies. In this work structures of 73 complexes of antibodies with small antigens were taken from PDB database and compared. The main epitope of studied ligands was an aromatic ring. Antibodies bound it with a deep cavity, lying between complementary determining regions (CDR)...

Empirical research on the relationship between market congestion and the market competitive level largely falsifies the positive relationship predicted by theoretical models. In this paper, I exploit the airline industry network structure and focus on the level of congestion during periods in which passengers cross-connect to their final destinations. About 70% of hub airport flights depart or ...

This paper studies incumbent price response to entry by low-cost carriers in the U.S. airline industry. I find that legacy carrier incumbents decrease their mean airfare, 10th percentile airfare, and 90th percentile airfare following entry by a low-cost carrier. Airfares decrease by a larger percentage at the right tail of the incumbents’ price distribution than at the left tail, suggesting tha...

Customer complaints are related to the experienced quality of a product or service. If product quality is unobservable ex ante, customer complaints may be driven by expectations as well as by the actually experienced quality. I test different hypotheses about the effects of actual quality and of expected quality on customer complaints in the U.S. airline industry. I find that there are fewer co...

The literature on the economics of airline codesharing has suggested that codeshare agreements serve to eliminate double marginalization that exists when unaffiliated airlines independently determine the price for different segments of an interline trip. Using a structural econometric model, this paper investigates whether codeshare contracts do eliminate double marginalization. The results sug...

Let F/Q be a number field closed under complex conjugation. Denote by L0(F (t)) the Witt group of hermitian forms over F (t). We find full invariants for detecting non–zero elements in L0(F (t))⊗Q, this group plays an important role in topology in the work done by Casson and Gordon. 1. L-groups and signatures Let R be a ring with (possibly trivial) involution. An –hermitian ( = ±1) form is a se...

Air transport has experienced phenomenal growth in China over the last 30 years, but studies on China’s airport development are few. This paper aims to fill in this literature gap by focusing on the determinants of airport development in the Chinese regions using the most up-to-day and comprehensive data on China’s airports and their related economic and geographical variables. The empirical re...

SUMMER 2000 6 NYSTA Research Reports A study was conducted to evalu ate golf putting green establish ment procedures with four creeping bentgrass (Agrostis palustris Huds.) cultivars: Penncross, Penn A-4, L93, and SR1119. Five seed rates were used (0.5, 1.0, 2, and 4 lb.) with five seed treatments: metalaxyl (Apron), Pseudomonas aureofaciens, Azospirillum brasilience, Enterobacter cloacae, and ...