This paper introduces the logarithmic autoregressive conditional duration model (Log-ACD model). The logarithmic version allows for more exibility than the ACD model of Engle and Russel (1995), when additional variables are included in the model. We apply the Log-ACD model to bid/ask prices relative to securities listed on the NASDAQ and investigate the way market makers revise their beliefs on...

fruit fly, ceratitis capitata (diptera:tephritidae), worldwide. to determine the best combination of trap and attractant for mass trapping of mediterranean fruit fly, a field experiment was conducted in a randomized complete block design (rcbd) with 6 treatments in 3 replications in a pomegranate orchard in shiraz (iran) in 2009. treatments included: 1-jackson trap baited with trimedlure, 2- mc...

OBJECTIVES To compare the finger pressure applied by dentists during cementation and to examine the effect of gender and time of day on finger pressure. METHODS Fifteen dentists (9 males, 6 females) formed a study group and 10 master dies in premolar shape and Turcom Cera all-ceramic crowns were prepared to measure the maximum finger pressure applied by dentists during cementation. The dentis...