32,094 research outputs found
Cooperation and Wealth
No full textWe calculate the equilibrium fraction of cooperators in a population in which payoffs accrue from playing a single-shot prisoner’s dilemma game. Individuals who are hardwired as cooperators or defectors are randomly matched into pairs, and cooperators are able to perfectly find out the type of a partner to a game by incurring a recognition cost. We show that the equilibrium fraction of cooperators relates negatively to the population’s level of wealth.Equilibrium fraction of cooperators, Population's level of wealth, Single-shot prisoner's dilemma game
Interview with Matthew Stark
No full textAnn Pflaum interviews Matthew Stark, graduate and former staff member of the University. Stark speaks about his experience as a staff member of the University and about his work with the Minnesota Civil Liberties Union.Stark, Matthew; Pflaum, Ann M.. (1999). Interview with Matthew Stark. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/48327
Inequality and Migration: A Behavioral Link
No full textWe provide an analytical-behavioral explanation for the observed positive relationship between income inequality, as measured by the Gini coefficient, and the incentive to migrate. We show that a higher total relative deprivation of a population leads to a stronger incentive to engage in migration for a given level of a population’s income; that total relative deprivation is positively related to the Gini coefficient; and that, consequently, the Gini coefficient and migration are positively correlated, holding the population’s income constant.Income inequality, Relative deprivation, The Gini coefficient, The incentive to migrate
Malcolm Stark Correspondence
No full textEntries include typed correspondence on The Camden Herald Publishing Company stationery concerning the whereabouts of Mr. Stark, a handwritten letter from Stark on plain paper, and a typed letter on receipt of the Maine poet\u27s book Way Out and Close About for the Maine Author Collection
Yoraperla uchidai Stark & Nelson
No full textYoraperla uchidai Stark & Nelson Yoraperla uchidai Stark & Nelson, 1994:257. Holotype ♂ (Uchida collection), Odae-chon, Odae-san, 700 m, Kang-uron-do, [Republic of] Korea Material examined. Republic of Korea: Gangwando, Odaesan, near Dong-daesan, 800 m, 37° 44.35’ N, 128° 35.71’ E, 3-21 June 2006, P. Tripotin, Malaise trap in old Korean fir forest, 8♀ (USNM). Comments. This is apparently the first report of Y. uchidai since the original description based on a male and female from two sites on Odaesan. Unfortunately, no additional male specimens are available for comparison with the holotype.Published as part of Stark, Bill P., 2010, Studies On Korean Stoneflies (Insecta: Plecoptera) With Descriptions Of Two New Species, pp. 1-10 in Illiesia 6 (1) on page 4, DOI: 10.5281/zenodo.475953
Anacroneuria exquisita Stark 1998
No full textAnacroneuria exquisita Stark Anacroneuria exquisita Stark 1998:566. Holotype ♂ (USNM), Rio Zurqui, Parque Nacional Braulio Carrillo, San Jose, Costa Rica Material examined. Costa Rica, Heredia, 9 km NE Vara Blanca, 10 ° 14’ N, 84 ° 06’ W, 1450-1550 m, 15 March 2005, S.M. Clark, D.R. Clark, 1♂ (BYUC). Comments. This species was previously known from the holotype and four male paratypes, all from the type locality.Published as part of Stark, Bill P., 2014, Records Of Mesoamerican Anacroneuria (Plecoptera: Perlidae), With Descriptions Of Four New Species, pp. 6-16 in Illiesia 10 (2) on page 8, DOI: 10.5281/zenodo.476047
Anacroneuria marca Stark 1998
No full textAnacroneuria marca Stark http://lsid.speciesfile.org/urn:lsid: Plecoptera.speciesfile.org:TaxonName1838 Anacroneuria marca Stark, 1998: 575. Holotype ♂ (United States National Museum), Costa Rica, Heredia Province, Río Peje, Parque Nacional Braulio Carrillo Anacroneuria marca: Gutiérrez-Fonseca and Springer, 2011: 29 Material examined. PANAMA: Chiriqui Province: Cuenca 102, (Río Chiriqui Viejo), afluente Río Chiriqui Viejo, 8.89307°N, 82.59969°W, 2189 m, Las Nubes dentro del PILA, 19 September 2016, C. Nieto, M. Molinar, and A. Tuñon, 1 ♀ (COZEM); same except, Río Colorado, Mount Totumas Biological Reserve, 8.873556°N, 82.689993°W, 26 June 2016, B. Armitage, 3 ♂ (COZEM); same except, 1 September 2016, 2 ♂; Chiriqui Province: Cuenca 93 (Río Guabo), afluente Río Guabo, NNE Fortuna Dam, nr Fortuna Cabins, 8.77806°N, 82.19359°W, 1128 m, UV light, 21 January 2017, B. and T. Armitage, 10 ♂ (COZEM); same except, 18 February 2018, 22 ♀ (COZEM); Chiriqui Province: Cuenca 108 (Río Chiriqui), Quebrada Hondo, NNE Fortuna Dam, 8.75003°N, 82.23884°W, 1128 m, B. and T. Armitage, 2 ♂ (COZEM). Comments. Stark (2014) and Armitage & Stark (2017) reported this species from Chiriqui Province. The species appears more common in Costa Rica (Stark 1998) than in Panama.Published as part of Stark, Bill P. & Armitage, Brian J., 2018, The Plecoptera of Panama. II. Two new species, one new country record, and additional locality records of Anacroneuria (Perlidae) from western Panama, pp. 315-326 in Zootaxa 4459 (2) on pages 318-319, DOI: 10.11646/zootaxa.4459.2.6, http://zenodo.org/record/145866
Anacroneuria ventana Stark 1998
No full textAnacroneuria ventana Stark Anacroneuria ventana Stark 1998:597. Holotype ♂ (USNM), Rio Peje, 1 km SE San Vicente, Alaquela, Costa Rica Material examined. Costa Rica, Heredia, 9 km NE Vara Blanca, 10 ° 14’ N, 84 ° 06’ W, 1450-1550 m, 20 March 2005, S.M. Clark, D.R. Clark, 2♂ (BYUC). Comments. This species was previously known from the holotype and two paratypes, collected in the Costa Rican provinces of Alajuela, Cartago and San Jose (Stark 1998). These are the first specimens from Heredia Province.Published as part of Stark, Bill P., 2014, Records Of Mesoamerican Anacroneuria (Plecoptera: Perlidae), With Descriptions Of Four New Species, pp. 6-16 in Illiesia 10 (2) on page 14, DOI: 10.5281/zenodo.476047
Anacroneuria spectori Stark 2004
No full textAnacroneuria spectori Stark Anacroneuria spectori Stark, 2004:74. Holotype ♂ (American Museum of Natural History), Park Nacional Amborό, Caballero Prov., Santa Cruz Dept., olivia Material examined. BOLIVIA: Santa Cruz Department, La Siberia, 17.820 ° S, 64.678 ° W, 2550 m, 20 April 2005, S.M. Clark, R . L. Johnson, 1♂ (BYUC). Comments. This species was previously known from five specimens all collected in Santa Cruz Department, Bolivia. Anacroneuria spectori Stark, 2004 Santa CruzPublished as part of Stark, Bill P. & Baumann, Richard W., 2011, Records Of Anacroneuria (Plecoptera: Perlidae) From Bolivia And Paraguay With Descriptions Of Three New Species, pp. 182-191 in Illiesia 7 (19) on pages 185-189, DOI: 10.5281/zenodo.476026
Perlesta baumanni : Stark 2004
No full textPerlesta baumanni Stark, 1989 Perlesta baumanni Stark, 1989:276. Holotype ♂ (United States National Museum), Mill Creek, near Y‐ City, Scott Co., Arkansas Perlesta baumanni: Poulton & Stewart, 1991:39 Perlesta baumanni: Stark, 2004:90 3 4 Material examined. Arkansas: Scott Co., Tan‐ a‐ hill Creek, Y‐ City, 13 May 2007, B. Stark, 1 ♂. Oklahoma: Latimer Co., Turkey Creek, Hwy 270 east of Red Oak, 12 May 2007, B. Stark, 7 ♂. LeFlore Co., Hodge Creek, Holsom Creek Road, 2 miles west of Hwy 270, 13 May 2007, B. Stark, 10 ♂, 5 ♀. Adult habitus. Color pattern.‐ The head is darkly pigmented, particularly on the area forward of the epicranial suture (Fig.1); the black suture line extends laterally beyond the ocelli about midway to the eye. Dark pigment extends laterally in front of the eye to the margins of the head, but an obscure pale spot interrupts the dark pigment anterolaterad to the ocelli. Forward of the M‐ line a dark median area is surrounded by pale pigment. The pronotum is dark brown with darker rugosities and black sutures. Abdominal terga 6‐10 are dark, with tergum 10 very dark over most of the surface (Fig. 2); abdominal sterna 8‐10 are dark brown to black. Apical cercal segments are black, but several segments at midlength are banded with dark apices and pale basal bands. Male aedeagus. Aedeagal tube + sac long and slender, caecum very small (Figs. 3‐4). Dorsal patch broad basally, covering entire surface, but patch narrows gradually to a point on the caecum from near midlength. Lateral sclerites slender and projecting forward beyond base of dorsal patch.Published as part of Stark, Bill P., 2007, Additional Characters In Perlesta Baumanni Stark (Plecoptera: Perlidae), With Notes On Other Ouachita Mountain Species, pp. 43-45 in Illiesia 3 (5) on pages 43-45, DOI: 10.5281/zenodo.475869
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