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Molecular subtyping methods have previously shown that there is a nonrandom distribution of Escherichia coli O157:H7 strains among clinical and nonclinical isolates. Two examples include the lineage-specific polymorphism assay (LSPA) and clade typing assay. The clade typing method was previously used to identify a phylogenetic group of E. coli O157:H7(More)
Ten Salmonella enterica serotypes were isolated from fecal samples collected from anesthetized raccoons (n = 738) trapped in six Pennsylvania counties from 2003 to 2005. Comparison of raccoon pulsed-field gel electrophoresis (PFGE) pulse type data with the Pennsylvania Department of Health PFGE database revealed that the patterns of seven Salmonella(More)
The paper analyses a two-sector model of endogenous growth with two common features of economic development: stages of sustained growth and underdevelopment traps. The model also demonstrates the transitional issues of a temporary underdevelopment trap, seemingly sustainable growth, and a slowdown in productivity growth. The temporary underdevelopment trap(More)
In the process of regulatory reform in the electric power industry, the mitigation of market power is one of the basic problems regulators have to deal with. We use experimental data to study the sources of market power with supply function competition, akin to the competition in wholesale electricity markets. An acute form of market power may arise if a(More)
We investigate the effectiveness of passenger shipping cartels in regulating migration across the Atlantic during the early twentieth century. We assemble from primary sources a detailed database of passenger flows and cartel operations and show that cartel operation reduced migratory flows by approximately 20% to 25%. Moreover, there is some evidence that(More)
Republication or reproduction of this report or its storage and/or dissemination by electronic means is permitted without the need for formal IUPAC permission on condition that an acknowledgement, with full reference to the source along with use of the copyright symbol 0, the name IUPAC and the year of publication are prominently visible. Publication of a(More)
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