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81.
Rethinking the regional knowledge production function 总被引:1,自引:0,他引:1
The knowledge production function is a questionable device foridentifying the determinants of commercial patenting. Adaptedfrom firm level analysis, it implicitly assumes that some mechanismexists to transfer research and development inputs across institutionsto maximize invention output. Augmenting the approach with regionalstructure variables risks confounding causes and effects, becausethese conditions determine research and development in the firstplace. We contrast a knowledge production function and a regionalstructure model to identify the determinants of commercial patentingin US states in the period 2002–2004. Results show thathuman capital, specialized knowledge flows, urbanization andindustry dominance in technical advance drive commercial patenting. 相似文献
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William Green Meghan Campbell Caves Leslie Lea Williams 《Midcontinental journal of archaeology, MCJA》2019,44(2):207-229
The earliest documented excavation of an effigy mound group by a professional archaeologist occurred in 1883 when Frederic Ward Putnam and local acquaintances excavated portions of four mounds at the Myrick Park site (47Lc10) in La Crosse, Wisconsin. Putnam worked on one effigy (similar to the short-tailed turtle form) and three conical mounds. Theodore H. Lewis visited the site in 1885 and mapped one additional conical mound. We examined documentation and collections housed at the Peabody Museum of Archaeology and Ethnology at Harvard University. Artifacts include a portion of a Madison Cord Impressed jar (a common Effigy Mound offering) and a trailed rim sherd similar to terminal Late Woodland types. Human remains represent a minimum of 23 individuals: 18 adults and 5 subadults. Dental and skeletal evidence indicates a relatively healthy population with low levels of nutritional deficiency, early life stress, and trauma, similar to other regional Late Woodland populations. 相似文献
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Catherine A. Key Leslie C. Aiello Theya Molleson 《International Journal of Osteoarchaeology》1994,4(3):193-207
Three age estimation techniques using ectocranial and/or endocranial suture closure are tested on a sample of known age from Spitalfields, London in order to determine the value of cranial suture closure as an indicator of age at death. The three techniques are those proposed by Acsádi and Nemeskéri, Meindl and Lovejoy and Perizonius. Results indicate that the Acsádi and Nemeskéri technique, which is based on endocranial sutures, can be used to distinguish young and middle-aged individuals in the Spitalfields sample but gives no information for crania over the age of 50 years. Age estimation using the Meindl and Lovejoy and Perizonius (Old system) techniques, which use ectocranial sutures, was found to be subject to a number of complicating factors, of which sexual dimorphism in the rate and pattern of closure is the most significant. A method of estimating age at death based on both endocranial and ectocranial suture closure is developed on the basis of the Spitalfields sample. The technique attempts to overcome some of the problems associated with both intra- and interpopulation variation in cranial suture closure. For a truly accurate age-estimation technique based on cranial suture closure we would need to know more about the causes and functions of suture closure in human populations. 相似文献
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In her 2005 article, "The Long Civil Rights Movement and thePolitical Uses of the Past," Jacquelyn Dowd Hall called on scholarsto complicate the story of civil rights by looking beyond atraditional narrative that begins in 1954, ends in 1965, focuseson the South, and features Martin Luther King, Jr. as the leaderof a single-voiced chorus of interracial activists who overcameracial barriers nonviolently. The recent wave of histories aboutarts movements in African-American communities (e.g., Pointfrom Which Creation Begins: The Black Artists Group ofSt. Louis, by Benjamin Looker, 2004, 相似文献