https://creativecommons.org/publicdomain/zero/1.0/https://creativecommons.org/publicdomain/zero/1.0/
Dataset Containing 173 College Common Data Sets
Contains Common Data Sets for the Following Schools:
Data collected based on secondary sources
The use of panels where the number of time periods and cross section units varies across applications creates a number of challenges for statisticians and econometricians, as well as for economic theory where network interactions are of interest. One very common form of interaction is spatial. Closeness or geographical contiguity is observable and there is a well developed field of spatial econometrics that deals with these issues. When the interaction is unobservable it may be that there is a common factor at work-global warming, for example, or a world financial crisis with pervasive effects globally. But there can also be more local forms of interaction which in addition to spatial patterns could take place in more abstract spaces such as social or economic networks.These abstract interactions can be both strong and weak. Strong interactions do not die away as the number of agents increases or as we move away from a 'neighbourhood'. Weak interactions do.This project will address these issues by developing econometric techniques for taking account of these interactions in a wide range of applications in economics.
In 2023, 19.5 percent of popular songs were written by female artists, marking an increase from the 2020 figure of 12.9 percent. This marked the highest year-over-year increase in the observed time period since 2012.
Marine Mammal and Seabird Surveys of The Southern California Bight Studies: -- So. Calif. Bight Low Aerial [Mammals] Study Code: SM Contract Number: AA550-CT7-36 Principal Investigator(s)/Affiliation: K. S. Norris and B. J. Le Boeuf, University of California, Santa Cruz, and G. L. Hunt, University of California, Irvine.
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Heteroplasmy, the presence of multiple distinct mitochondrial genotypes (mitotypes) within an individual, has long been thought to be a rare aberrance that is quickly removed by selection or drift. However, heteroplasmy is being reported in natural populations of eukaryotes with increasing frequency, in part due to the development of better diagnostic molecular methods. Here, we report a seemingly stable heteroplasmic state in California populations of the polyphagous shothole borer (PSHB), Euwallacea fornicatus; an exotic invasive ambrosia beetle that is causing significant tree dieback. We develop and validate a qPCR assay that utilizes novel locked nucleic acid probes to detect different mitotypes, and qualitatively assess heteroplasmy in individual PSHB. We prove the utility of this assay by: a) mitotyping field-collected PSHB to document the prevalence of heteroplasmy across its invasive range in southern California; and, b) measuring relative titers of eac h mitotype across multiple generations of heteroplasmic PSHB colonies in the laboratory to assess the stability of transmission through the maternal germline. We rule out the possibility that heteroplasmy is due to a NUMT, and find that heteroplasmic individuals are common in Californian field populations of PSHB, and that heteroplasmy persists in a stable state for at least 10 generations in experimental colonies. We also looked for evidence of the common occurrence of paternal leakage, but found none. In light of our results, we discuss competing hypotheses as to how heteroplasmy may have first arisen, and continues to perpetuate, in Californian PSHB populations. Methods Flurescence data collected via Rotor-Gene Q, from qPCR assays utilizing LNA probes to detect two competing mitotypes (alleles) in single individuals.
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https://creativecommons.org/publicdomain/zero/1.0/https://creativecommons.org/publicdomain/zero/1.0/
Dataset Containing 173 College Common Data Sets
Contains Common Data Sets for the Following Schools: