Submitted by Paulo Vitor Antonacci Moura (pvantonacci@gmail.com) on 2018-08-17T12:51:35Z No. of bitstreams: 1 Dissertação_AntonacciPaulo_Depositar.pdf: 972457 bytes, checksum: 104fedd6777d4affc6cf0a3c3efcc0dd (MD5) / Approved for entry into archive by GILSON ROCHA MIRANDA (gilson.miranda@fgv.br) on 2018-08-23T18:58:23Z (GMT) No. of bitstreams: 1 Dissertação_AntonacciPaulo_Depositar.pdf: 972457 bytes, checksum: 104fedd6777d4affc6cf0a3c3efcc0dd (MD5) / Made available in DSpace on 2018-08-28T18:01:39Z (GMT). No. of bitstreams: 1 Dissertação_AntonacciPaulo_Depositar.pdf: 972457 bytes, checksum: 104fedd6777d4affc6cf0a3c3efcc0dd (MD5) Previous issue date: 2018-04-06 / The quality of teachers is a determining factor in the formation of human cap-ital, so it is also an object of study of economic development. We develop a generalequilibrium model in which workers are heterogeneous and make decisions in a labormaket with frictions. Additionally, teacher quality is input to human capital formation.Empirically we use a cross country dataset to check the results. We also simulate theUS’s labour market frictions to all economies. We found that improving the eviromentwhere teacher’s occupational choices are made, we increase the overall productivity by 110%

Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-06-26T20:13:44Z No. of bitstreams: 1 alcidesfariasndrade.pdf: 803619 bytes, checksum: 302375f647c6bebde2042805b53cddc2 (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-08-07T20:49:09Z (GMT) No. of bitstreams: 1 alcidesfariasndrade.pdf: 803619 bytes, checksum: 302375f647c6bebde2042805b53cddc2 (MD5) / Made available in DSpace on 2017-08-07T20:49:09Z (GMT). No. of bitstreams: 1 alcidesfariasndrade.pdf: 803619 bytes, checksum: 302375f647c6bebde2042805b53cddc2 (MD5) Previous issue date: 2011-08-25 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Estudamos um defeito tipo deslocação com simetria esférica. Encontramos a métrica para um meio contendo uma única deformação deste tipo. Para isso, calculamos o vetor deslocamento por meio da teoria linear da elasticidade e usando o esquema da teoria geométrica de defeitos, na qual o meio é caracterizado por objetos geométricos tais como curvatura e torção, encontramos as componentes do tensor métrico. Calculamos também outras quantidades geométricas como os tensores de Riemann e Ricci, e o escalar de curvatura bem como as componentes do tensor momento-energia. Em todas estas quantidades aparecem funções δ, indicando divergência na superfície onde está localizado o defeito. Fora desta superfície, o meio possui uma geometria euclideana. Resolvemos as equações geodésicas radial e no plano para a região externa ao defeito e observamos que, mesmo localizado, ele exerce influência sobre o movimento nesta região. / We study a dislocation defect with spherical symmetry. We find the metric for a medium containing a single deformation of this kind. For this, we calculate the displacement vector through the linear theory of elasticity and using the scheme of geometric theory of defects, in which the medium is characterized by geometric objects such as curvature and torsion, we find the components of the metric tensor. We calculate also other geometrical quantities as the Riemann and Ricci tensor, and the scalar curvature as well as the energy-momentum tensor. In these quantities, δ-functions show up, indicating divergence in the surface where the defect is located. Outside this surface, the medium has an Euclidean geometry. We solve the geodesic equations for the outer region to the defect and we observed, despite being located, its influence on the movement in this region.