265,687 research outputs found
Interview with Leonard R. Ruiz, 2008.
No full textLeonard R. Ruiz discusses his family history as he was growing up in Von Ormy, TX, including the opening of Southwest High School and his grandmother’s brother, Sebastian Chavez, who was one of the first Hispanic Texas Rangers
Contribuciones a la Lingüística y a la Comunicación Social. Tributo a Vitelio Ruiz Hernández
No full textEn el volumen se reúnen distintos trabajos relacionados con la Adquisición del español como lengua primera (L1), el Análisis del discurso, la Antropología lingüística, el Español como lengua extranjera (ELE), el Español como segunda lengua (EL2), la Fonética, la Fonología, las Humanidades digitales, la Lexicografía, la Lexicología, la Lingüística computacional, la Lingüística de corpus, etc
Job Creation and Investment in Imperfect Capital and Labor Markets
No full textThis paper shows that liquidity constraints restrict job creation even with flexible labor markets. In a dynamic model of firm investment and demand for labor with imperfect capital markets, represented as a constraint on dividends, and imperfect labor markets, contained in legal firing and hiring costs applicable to some workers, firms use flexible labor contracts to alleviate financial constraints. The optimal policy rules of the theoretical model are integrated into a maximum likelihood procedure to recover the model's behavioral parameters. Data for the estimation come from the CBBE (Balance Sheet data from the Bank of Spain). I evaluate the effects of removing one imperfection at a time, and show that the relaxation of financial constraints produces (i) more job creation than the elimination of labor market rigidities, and (ii) a substantial increase in firm investment, which does not happen if only labor market rigidities are removed.Job Creation, Employment, Investment, Adjustment Costs, Liquidity Constraints, Structural Estimation.
Tartamura Bustamante & Ruiz 2017
No full textGenus Tartamura Bustamante & Ruiz, 2017 Type species: Tartamura agatelin Bustamante & Ruiz, 2017.Published as part of Bustamante, Abel A. & Ruiz, Gustavo R. S., 2020, New species and records of thiodinines from North and South America (Araneae Salticidae: Salticinae: Thiodinini), pp. 115-140 in Zootaxa 4899 (1) on page 123, DOI: 10.11646/zootaxa.4899.1.6, http://zenodo.org/record/440075
Thiodina firme Bustamante & Ruiz 2017
No full textThiodina firme Bustamante & Ruiz, 2017 Thiodina firme Bustamante & Ruiz, 2017: 333, figs 8I, 9B, 24 (Holotype Ƌ: BRAZIL: Pará: Juruti, Várzea Piranha, 02.210028°S, 56.122417°W, leg. N.F. Lo-Man-Hung, 22.II.2011, MPEG 34602 —re-examined). Description and diagnosis. See Bustamante & Ruiz (2017). Other material examined (new records). BRAZIL: Paraíba: Condado, 6.909647°S, 37.599555°W, leg. P.F.L. Duarte, 30.VIII.1978, 1 Ƌ (MNRJ 6754). Note. According to the original description (Bustamante & Ruiz 2017: 334), the holotype has d1-1-1-1 macrosetae on femur I, while the specimen from Paraíba has the typical d1-1-1 pattern. Distribution. Known only from Brazilian states of Pará and Paraíba.Published as part of Bustamante, Abel A. & Ruiz, Gustavo R. S., 2020, New species and records of thiodinines from North and South America (Araneae Salticidae: Salticinae: Thiodinini), pp. 115-140 in Zootaxa 4899 (1) on page 131, DOI: 10.11646/zootaxa.4899.1.6, http://zenodo.org/record/440075
Neonella salafraria Ruiz & Brescovit 2004
No full textNeonella salafraria Ruiz & Brescovit, 2004 Neonella salafraria Ruiz & Brescovit, 2004: 282, figs 1‒5 (Ƌ holotype from Sergipe, Brazil, 31.X.2000, L. Ianuzzi leg., IBSP 45094); Rubio, Argañaraz & Gleiser 2015: 9, fig. 4B. Diagnosis and description. See Ruiz & Brescovit (2004). Material examined. BRAZIL: Piauí: 1♂, Piracuruca, [04°06’58.8”S, 41°41’29.7”W], 11 December 2006; 1♂, same locality, 26 January 2007, both Carvalho et al. (MPEG). Distribution. States of Sergipe and Piauí (Brazil). Acknowledgment We would like to thank Hilton Costi (MPEG) for helping with the SEM images.Published as part of Salgado, Alexandre & Ruiz, Gustavo R. S., 2018, Two new species of Neonella Gertsch, 1936 (Araneae: Salticidae: Euophryini), pp. 537-548 in Zootaxa 4394 (4) on page 547, DOI: 10.11646/zootaxa.4394.4.4, http://zenodo.org/record/119997
Tartamura agatelin Bustamante & Ruiz 2017
No full textTartamura agatelin Bustamante & Ruiz, 2017 Tartamura agatelin Bustamante & Ruiz, 2017: 326, figs 2, 8F, 18–19 (Holotype Ƌ: ECUADOR: Orellana: Yasuní Reserve Station Area, 0.6806°S, 76.3940°W, 260 m a.s.l., leg. W.P. Maddison, 9.VIII.2011 (roadside tree), QCAZ—re-examined). Description and diagnosis. See Bustamante & Ruiz (2017). Other material examined (new records). ECUADOR: Orellana: Yasuní Reserve Station Area, 0.6806°S, 76.3940°W, 260 m a.s.l., leg. W.P. Maddison, 9.VIII.2011 (roadside tree), 1Ƌ (UBC-SEM); Lagunas trail, 0.6722°S, 76.3994°W, leg. W.P. Maddison, E. Piasick & M. Vega, 280 m a.s.l., 5.VIII.2011 (day-old treefall), 1Ƌ (UBC-SEM). Distribution. Known only from a few localities in Orellana, Ecuador.Published as part of Bustamante, Abel A. & Ruiz, Gustavo R. S., 2020, New species and records of thiodinines from North and South America (Araneae Salticidae: Salticinae: Thiodinini), pp. 115-140 in Zootaxa 4899 (1) on page 123, DOI: 10.11646/zootaxa.4899.1.6, http://zenodo.org/record/440075
Matinta Ruiz & Maddison 2019
No full text<i>Matinta</i> Ruiz & Maddison, 2019 <p> <b>Type species:</b> <i>Mago acutidens</i>, Simon 1900, by original designation.</p> <p> <b>Diagnosis and phylogenetic position.</b> See Ruiz <i>et al.</i> (2019).</p>Published as part of <i>Matos, Tainá D. S. & Ruiz, Gustavo R. S., 2023, On the taxonomy of the jumping spider genus Matinta Ruiz & Maddison, 2019, with a taxonomic revision of the vicana species-group (Araneae: Salticidae: Amycini), pp. 126-150 in Zootaxa 5343 (2)</i> on page 128, DOI: 10.11646/zootaxa.5343.2.2, <a href="http://zenodo.org/record/8324346">http://zenodo.org/record/8324346</a>
Employment and Deadweight Loss Effects of Observed Non-Wage Labor Costs
No full textTo assess the employment effects of labor costs it is crucial to have reliable estimates of the labor cost elasticity of labor demand. Using a matched firm-worker dataset, we estimate a long run unconditional labor demand function, exploiting information on workers to correct for endogeneity in the determination of wages. We evaluate the employment and deadweight loss effects of observed employers' contributions imposed by labor laws (health insurance, training, and taxes) as well as of observed workers' deductions (social security, and income tax). We find that non-wage labor costs reduce employment by 17% for white-collars and by 53% for blue-collars, with associated deadweight losses of 10% and 35% of total contributions, respectively. Since most firms undercomply with mandated employers' and workers contributions, we find that full compliance would imply employment losses of 4% for white-collars and 12% for blue-collars, with respective associated deadweight losses of 2% and 6%.Employment, Deadweight Loss, Job Creation, Labor Costs, Labor Law
Thiodina camilae Bustamante & Ruiz 2020, sp. nov.
No full textThiodina camilae sp. nov. Figs 9–10, 52–63 Etymology. The specific name honours Camila Cerón M.D., best female friend of the first author for more than 20 years, in recognition of her friendship, support, encouragement and patience. This also alludes to her short stature, like the representatives of this species. Diagnosis. Males and females of T. camilae sp. nov. resemble those of T. minuta (Galiano, 1977), T. perian Bustamante & Ruiz, 2017 and T. tyrioni sp. nov. by the general appearance (carapace yellow with black borders, a pair of brown stripes on the thoracic region, abdomen dorsally as in genus) and small body. Males of T. camilae sp. nov. differ from those of T. minuta and T. perian by the length of the embolus of the palp (360°), longer than the embolus of T. minuta (270°), but shorter than the embolus of T. perian (450°, 1T+90°) and T. tyrioni sp. nov. (480°, 1T+120°) [compare Figs 56 and 58 with Figs 68 and 70, Galiano (1977b: fig. 14) and Bustamante & Ruiz (2017: fig. 26A)]. The females resemble those of T. minuta, T. perian and T. tyrioni sp. nov. by the rounded shape of the spermathecae, but differ by the longer sclerotized portion of the copulatory ducts [compare Figs 62–63 with Figs 74–75, Galiano (1977b: fig. 17) and Bustamante & Ruiz (2017 fig. 26F)]. Description. Male (Holotype, UBC-SEM). Total length 1.84. Carapace length 0.88, width 0.59, height 0.36. AME diameter 0.19. Ocular quadrangle length 0.51. Anterior eye row width 0.56. Posterior eye row width 0.61. Abdomen length 0.96. Chelicera paturon: spine-like setae absent; promargin with one tooth, tricuspid, middle cusp larger than others, retromargin with two teeth, both curved. Excavation of chelicera absent. Leg I: femur 0.42x0.18, patella 0.24, tibia 0.29, metatarsus 0.23, tarsus 0.20; II: fe 0.34, pa 0.19, ti 0.21, mt 0.18, ta 0.17; III: fe 0.32, pa 0.17, ti 0.19, mt 0.19, ta 0.19; IV: fe 0.45, pa 0.20, ti 0.31, mt 0.26, ta 0.21. Leg formula 4123. Leg macrosetae: femur I–IV d1di, p0, r0; patella I–IV 0; tibia I p0, r0, v1r-0-2a-0; II p0, r0, v1r-0-0; III–IV 0; metatarsus I–II p0, r0, v2-2; III p2di, r2di (r0 right), v0; IV p2di, r2di, v0. Palp (Figs 56–59): tibia wider than long, RTA triangular, RvTA rounded (Figs 57, 59), PTA rounded (Fig. 58); embolus simple, fixed to tegulum, arising distally (12:00), with path of 360° before distal coil (Figs 56, 58). Color in alcohol: carapace yellow with black borders, two brown stripes on thoracic region, abdomen dorsum yellow, with three longitudinal dark stripes, sides with one longitudinal dark stripe (five stripes in total), venter yellow, spinnerets yellow. Femur I yellow, patella, tibia and metatarsus dark; other legs yellow (Figs 52–53). Female (Paratype, UBC-SEM). Total length 1.85. Carapace length 0.91, width 0.60, height 0.38. AME diameter 0.21. Ocular quadrangle length 0.53. Anterior eye row width 0.62. Posterior eye row width 0.65. Abdomen length 0.95. Chelicera paturon: promargin with two teeth, distal one bicuspid and curved, other unicuspid and curved, retromargin with one bicuspid and curved tooth. Leg I: femur 0.38x0.16, patella 0.24, tibia 0.26, metatarsus 0.19, tarsus 0.18; II: fe 0.34, pa 0.22, ti 0.20, mt 0.16, ta 0.16; III: fe 0.32, pa 0.18, ti 0.19, mt 0.17, ta 0.18; IV: fe 0.45, pa 0.20, ti 0.28, mt 0.23, ta 0.19. Leg formula 4123. Leg macrosetae: femur I–III d1di, p0, r0; IV d0-1-1, p0, r0; patella I–IV 0; tibia I p0, r0, v2-1r-0 (v2-2-0 right); II p0, r0, v1r-1r-0; III 0; IV p0, r0, v1pdi (v0 right); metatarsus I p0, r0, v2-2; II p0, r0, v1r-2; III p2di, r1di, v0; IV p1di, r2di (r1di right), v0. Epigyne (Figs 60–63): posterior border without lobes, copulatory openings U-shaped and posteriorly placed (Figs 60–61), copulatory ducts projected posteriorly to epigynal border (Figs 62–63). Color in alcohol: as in male, except for legs yellow and carapace lighter (Figs 54–55). Spine variation (one Ƌ, paratype). Femur I p1di; II d0-1-1, p1di; III: p1di; IV d1-1-1; Tibia I v1r-0-2a-1p; II v1r-1r-0; IV v2di; metatarsus II p1di. Type material. Holotype Ƌ: DOMINICAN REPUBLIC: Barahona: Parque Nacional Sierra Martín García, 18.424°N, 71.112°W, 170 m a.s.l., leg. W.P. Maddison, G.B. Edwards, J. Zhang & G. R. S. Ruiz, 21.VII.2009 (UBC-SEM). Paratypes: DOMINICAN REPUBLIC: Barahona: Parque Nacional Sierra Martín García, 18.424°N, 71.112°W, 170 m a.s.l., leg. W.P. Maddison, G.B. Edwards, J. Zhang & G. R. S. Ruiz, 21.VII.2009, 1♀ (UBC-SEM). Pedernales: Pedernales, 17.964°N, 71.652°W), 13 m a.s.l., leg. W. Maddison, G.B. Edwards, J. Zhang, G. R.S. Ruiz & N. Corona, 18.VII.2009, 3♀ (UBC-SEM); E of Pedernales, 17.965°N, 71.635°W, 30 m a.s.l., leg. W.P. Maddison, G.B. Edwards, J. Zhang, G. R. S. Ruiz & N. Corona, 1Ƌ 1♀ (UBC-SEM). Other material examined. DOMINICAN REPUBLIC: Pedernales: E of Pedernales, 17.965°N, 71.635°W, 30 m a.s.l., leg. W.P. Maddison, G.B. Edwards, J. Zhang, G. R. S. Ruiz & N. Corona, 17.VII.2009, 3 imm. (UBC-SEM); near Pedernales, 17.964°N, 71.652°W, 13 m a.s.l., leg. W.P. Maddison, G.B. Edwards, J. Zhang, G. R. S. Ruiz & N. Corona, 18.VII.2009, 3 imm. (UBC-SEM). Distribution. Known only from the type locality, Dominican Republic.Published as part of Bustamante, Abel A. & Ruiz, Gustavo R. S., 2020, New species and records of thiodinines from North and South America (Araneae Salticidae: Salticinae: Thiodinini), pp. 115-140 in Zootaxa 4899 (1) on pages 131-134, DOI: 10.11646/zootaxa.4899.1.6, http://zenodo.org/record/440075
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