Aggregations and Marginalization of GARCH and Stochastic Volatility Models

The GARCH and Stochastic Volatility paradigms are often brought into conflict as two competitive views of the appropriate conditional variance concept : conditional variance given past values of the same series or conditional variance given a larger past information (including possibly unobservable state variables). The main thesis of this paper is that, since in general the econometrician has no idea about something like a structural level of disaggregation, a well-written volatility model should be specified in such a way that one is always allowed to reduce the information set without invalidating the model. To this respect, the debate between observable past information (in the GARCH spirit) versus unobservable conditioning information (in the state-space spirit) is irrelevant. In this paper, we stress a square-root autoregressive stochastic volatility (SR-SARV) model which remains true to the GARCH paradigm of ARMA dynamics for squared innovations but weakens the GARCH structure in order to obtain required robustness properties with respect to various kinds of aggregation. It is shown that the lack of robustness of the usual GARCH setting is due to two very restrictive assumptions : perfect linear correlation between squared innovations and conditional variance on the one hand and linear relationship between the conditional variance of the future conditional variance and the squared conditional variance on the other hand. By relaxing these assumptions, thanks to a state-space setting, we obtain aggregation results without renouncing to the conditional variance concept (and related leverage effects), as it is the case for the recently suggested weak GARCH model which gets aggregation results by replacing conditional expectations by linear projections on symmetric past innovations. Moreover, unlike the weak GARCH literature, we are able to define multivariate models, including higher order dynamics and risk premiums (in the spirit of GARCH (p,p) and GARCH in mean) and to derive conditional moment restrictions well suited for statistical inference. Finally, we are able to characterize the exact relationships between our SR-SARV models (including higher order dynamics, leverage effect and in-mean effect), usual GARCH models and continuous time stochastic volatility models, so that previous results about aggregation of weak GARCH and continuous time GARCH modeling can be recovered in our framework.

Marginalization and Transnationalizing Movements: How Does One Relate to the Other?

The main objective of this chapter is to address the following theoretical issue: How are the transnationalization and the marginalization processes related? We suggest that in order to understand more accurately how marginalized people’s movements and transnationalization processes are embedded, we need to open our understanding of transnationalization processes to see what the actors do when they build transnationalizing movements. In order to analyze experiences of poor people’s movement transnationalizing, we propose first to consider transnationalization as a social practice of solidarities building and second, as practices of “translation,” a search of recognition beyond borders.

Non-challenging education and teacher control as factors for marginalization of students in diverse settings

This article discusses teachers’ attitudes towards immigrant students in poor settings and the effect these attitudes have on organization of education on classroom level. It draws on results from two ethnographic studies where some primary school classes in Sweden were followed with participant observation and interviews as main research methods. The article focuses on classroom activities and teachers’ attitudes towards immigrant students and students with low socio-economic status. In the article is argued for the importance of presenting students in poor settings with demanding tasks and challenging education. In these cases, intellectually undemanding tasks in combination with little room for students’ own initiatives resulted in low enthusiasm among students regarding schoolwork and accordingly low learning, while classroom work that demanded active involvement by students in combination with high level of students’ influence on what took place in classrooms resulted in high level of students’ engagement and high outcome.

Marginalization of the Youth – a Current Societal Development?

The last two years a discussion on reforming the public sector has emerged. At its very heart we find important concepts like ‘quality reform’, ‘democracy’, and ‘development’. Recently I have presented an example of the ‘quality reform’ in SocMag, and this leads me to prolong that discussion on central themes on welfare state and democracy. Much energy is invested in arguing about management of the public sector: Do we need more competition from private companies? Do we need more control? Are more contracts concerning outcome needed? Can we be sure about the accountability needed from politicians? How much documentation, effectiveness measurement, bureaucracy, and evidence-based policy and practice are we looking for? A number of interesting questions – but strange enough we do not discuss the purpose of ‘keeping a welfare state’. What sort of understanding is lying behind the welfare state, and what kind of democracy are we drawing upon?

Approaching Migrant Youth Marginalization through the Capabilities Approach: Methodological Proposals

Adopting the capabilities approach and the terminology that has been respectively developed, we could assume that Amartya Sen’s “capabilities” consist in the actual living that people manage to achieve (“functionings”) as a result of actual free will. Sen’s freedom does not “only [depend on the] mere degree of the presence or absence of coercion or interference (from others)” (Otto and Ziegler 2006) but also on “the range of options a person has in deciding what kind of life to lead” (Dreze and Sen 1995, 10). In his book, Identity and Violence, Sen, without explicitly connecting the capabilities approach with his views on “genuine multiculturalis” (Sen 2007), in fact, introduces this extended conception of freedom in the way we examine identity matters. Since freedom becomes perceptible as the range of options a person has, concerning the kind of life he wishes to live, cultural freedom can be defined through the concept of the multiplicity of belonging. In other words, cultural freedom constitutes itself a capability, which is realized when nothing and no one, not even myself, can tie me down to a kind of cultural rigidity that tends to exclude and marginalize me. This latent connection of “capabilities” with “multiple identities” (Sen 2007) challenges us to search for the contribution Sen’s approach could have in the understanding and confrontation of issues concerning migrants, away from theoretical patterns that overemphasize the cultural otherness as an impediment to inclusion. Besides, Sen himself, without of course focusing exclusively on migrants, has already approached the matter of social exclusion with terms of his capabilities approach (Sen 2000).

Globalization and the Marginalization of Educational Purpose: Preparation of Workers and Citizens for the 21st Century and the Vision of Sustainable Futures

Human capital development remains a primary goal of modern schooling. This paper raises questions concerning the link between global economic needs and school-based human capital development. The primary mission of preparing students for the workplace may weaken other educational missions vital in achieving a more sustainable future for humanity.

Dark Teens and Dangerous Nature- Neopagan Narratives of Cultural Marginalization

Sarah M. Pike, Professor of Comparative Religion and Director of the Humanities Center at California State University, Chico, presents a lecture on the subject of projections of both evil and witchcraft on young adults. Lecture held at the Green Library, Modesto Maidique Campus, Florida International University on September 30, 2014.

Early intervention: Narratives of learning, discipline and enculturation

Current understandings about literacy have moved away from the belief that literacy is simply a process that individuals do in their heads. These understandings do not negate the importance of the individual aspects of literacy learning, but they emphasize understandings of literacy as a social practice. In many cases, responses to early literacy intervention seem to be grounded in theories that appear out of step with current literacy research and consequent evidence that literacy is socially and culturally constructed. One such response is the Reading Recovery programme based on Clay’s theory of literacy acquisition. Clay (1992) describes the programme as a second chance to learn. However, others have suggested that programmes like Reading Recovery may in fact work toward the marginalization of particular groups, thereby helping to maintain the status quo along class, gender and ethnic lines. This article allows two professionals to bring their insider’s knowledge of Reading Recovery to an analysis of the construction of the programme. The article interweaves this analysis with the personal narratives of the researchers as they negotiated the borders between different understandings and beliefs about literacy and literacy pedagogy.

Portugal amigo da terceira idade? Bem, haja Manoel de Oliveira ...

O artigo 72º da Constituição (CRP), «Terceira idade», é claro: «1. As pessoas idosas têm direito à segurança económica e a condições de habitação e convívio familiar e comunitário que respeitem a sua autonomia pessoal e evitem e superem o isolamento ou a marginalização social. § 2. A política de terceira idade engloba medidas de carácter económico, social e cultural tendentes a proporcionar às pessoas idosas oportunidades de realização pessoal, através de uma participação activa na vida da comunidade.». Abstract: Article 72 of the Constitution (CRP), "Seniors cirtizens", of course: '1. Older people have the right to economic security and housing conditions and family and community life that respect their personal autonomy and avoid and overcome isolation or social marginalization. § 2. The policy for the aged include economic measures, social and cultural nature designed to provide the elderly with opportunities for personal achievement through active participation in community life. ".

Contemporary issues in the government and administration of Latin American megacities

This paper is the first to systematically analyze and compare the structures of city governance and administration for seven major cities in Latin America, four of which are megacities (population of over 10 million), and three others are large national capitals. U.S. and U. K. models of city administration are reviewed as baseline models against which differences in Latin American may be explored. Structures of Government in Latin America show several important features and trends: 1) the lack of metropolitan (cross jurisdictional) authority; 2) the existence of strong mayors and weak councils"; 3) high levels of partisanship; 4) overlapping rather than interlocking bureaucracies; 5) pressures towards the privatization of city services, but continuing tension over the desirability of public versus private control; 6) greater fiscal responsibility and autonomy; and 7), a continuing marginalization of public participation in megacity governance.In spite of these features, many cities throughout the region (regardless of whether they are megacity size or national capitals), are actively intensifying their efforts to develop more effective, accountable and democratic governance structures.

A questão do género em Moçambique: contributo para uma análise da sua problemática

RESUMO:O desenvolvimento entendido como um processo político, económico e social, visando uma melhoria constante do bem-estar de toda a população, requer a alocação e utilização de recursos para benefício social e económico da sociedade. Porém, em Moçambique, neste processo, o crescimento e progressão dos grupos sociais ainda é desigual, ocorrendo uma certa marginalização e menor participação nos processos de tomada de decisão, das mulheres e dos grupos desfavorecidos. O presente estudo, subordinado ao tema: “A Questão do Género em Moçambique: Contributo para uma análise da sua problemática”, procurou compreender a importância e o contributo das mulheres moçambicanas inseridas em diferentes áreas de desenvolvimento e o seu empoderamento. O estudo foi centrado nas diversas formas de luta e de intervenção contra a pobreza e a exclusão social. A metodologia do presente trabalho consistiu numa pesquisa empírica através da observação participante, onde foram feitas entrevistas, utilizando guiões pré-elaborados que permitiram recolher os perfis sociológicos das ONGs que trabalham directamente com as questões de género. Foram entrevistadas mulheres que ocupam lugares-chave nas instituições governamentais e algumas parlamentares. Foi igualmente consultada a documentação oficial bem como os dados estatísticos que abordam questões ligadas ao género. As observações feitas indicam-nos que a mulher em Moçambique busca gradualmente o seu espaço no desenvolvimento da sociedade, não se esgotando a sua participação apenas nos processos decisórios a nível governamental e das ONGs, antes estendendo-se ao associativismo nos mais diversos campos sociais. A mulher moçambicana participa hoje, individualmente ou organizada em grupo, em lutas e reivindicações colectivas, tendo crescido positivamente ao conseguir ultrapassar diversos obstáculos. A título de conclusão recomenda-se a inclusão de profissionais da área social nos programas de desenvolvimento. Seria uma forma de fortalecer os avanços já alcançados. A presença de assistentes sociais nos órgãos públicos e noutros sectores mais sensíveis, iria por certo permitir reduzir as preocupações dos que buscam estes serviços. ABSTRACT: The present study on the subject: “The Question of Gender in Mozambique: Development and Issues”, demand to understand the importance and contribution that non-governmental organizations provides on the effort of Mozambican woman in having in the society the space that on right belongs to her. The development understood as the economic, social, cultural and political process that aimed a continuous improvement of the population welfare, require the allocation and use of resources for social and economic benefit of society. However in many countries, as is the case of Mozambique, this process is the advancement of certain groups accompanied by the marginalization, exclusion and subordination of others, especially women. Despite improvement in education and combating poverty, access to education for women remains an unusual reality and poverty persists to affect much of Mozambican women, thus causing its social exclusion. On the other hand, although the law recognizes gender equality, women are still oppressed and often the only career that is destined is to be married, take care of the field and having children. However, several exceptions have occurred in which women have to take political positions and functions exclusively reserved to men before. Women's organizations and women leaders participating in favour of the defence of other women have been contributing to its success. UFUPISHO:Maendeleo, yanayosikiwa kama utaratibu wa jamii, ambao unalinga hali njema ya mustarehe wa watu wote wa nchi, yanahitaji toleo na utumizi wa vifaa kwa fadhili ya jamii na ya kiuchumi ya watu jamii. Walakini katika Mozambiki, mwendeleo unaotukia utaratibuni huu hauko sawa. Funzo hili la kuhusu jambo: “ Swali la jinsi ya kuwa kiume au kike Mozambiki: Maendeleo na Tatizo “, lilitafuta kufahamu muhimu na msaada wa wanawake wa Mozambiki katika maeneo mbalimbali ya maendeleo na ongezo la uwezo wao. Funzo lilifanywa juu ya namna nyingi za mapigano na uamuzi kwa kupingana na umaskini na ondoleo katika jamii. Taratibu ya funzo hili ilikuwa uchunguzi jarabati katika onyo la kushirika,ambamo yalifanywa mahojiano, yakitumia maongozi yaliyofanywa mbele ambayo yaliruhusu kujua tabia za elimujamii za “ONGs” ambazo zinafanya kazi juu ya maswali ya jinsi ya kuwa kiume au kike. Walihojiwa wanawake ambao wanamiliki kazi muhimu katika mashirika ya serikali na wanawake wa bunge. Zilichunguwa pia hati rasmi na takwimu zinazohusu maswali ya jinsi ya kuwa kiume au kike. Maonyo yaliyofanywa yanatuonyesha ya kwamba mwanamke katika Mozambika anatafuta kidogo kidogo nafasi yake maendeleoni ya watu jamii, asipojichosha tu kwa kushirika katika taratibu za kubezwa za serikali za “ONGs” na ushirikiano, ukijitanda kwa maeneo ya jamii makubwa zaidi. Mwanamke wa Mozambiki anashirika peke au kwa kundi, akiunganika mapiganoni na madaini ya pamoja, akigua na akiweza kupita vizuizi vingi. Inashauriwa kwamba kama namna ya kuimarisha maendeleo na kwa sababu mwanamke yuko katika sehemu nyingi za jamii, anaingia ndani ya sekta mbalimbali za ufundi kama kwa mfano msaidizi wa jamii. Kuwapo kwa msaidizi wa jamii katika mashirika ya umma na katika sekta nyingine mbalimbali kutaruhusu kumaliza shughuliko ya wale ambao wanatafuta kazi hizi.

Desenvolvimento de competências digitais nos internos da Associação Assistencial Amigos do Amanhã

A presente pesquisa tem por objetivo investigar mediante observações e entrevistas as consequências da implantação de uma política inclusiva, utilizando-se de tecnologias de informação e comunicação (TIC) em uma associação assistencial. Possibilitando, através da disponibilização de computadores e programas educativos, observar o desenvolvimento do sujeito portador de condições cognitivas desfavoráveis em função de problemas associados a fatores físicos e socioeconômicos. Buscou-se com este trabalho, através de uma abordagem qualitativa de natureza aplicada, analisar quais elementos determinantes de boa absorção de conteúdos e desenvolvimento de competências estão suscetíveis a entraves, verificando-se o quanto do fator motivacional pode estar envolvido no processo, identificando formas de se trabalhar a retenção e participação dos internos da instituição. A diversidade de anseios e expectativas associadas às condições cognitivas de cada participante foi determinante para acarear as representações de grupos distintos em suas particularidades, onde cada indivíduo apresentava uma resposta diferente aos estímulos apresentados durante o processo de exposição do material educacional. Concluiu-se que a política de inclusão digital objetivando minimizar os efeitos da marginalização de um contingente esquecido pela sociedade, tem de estabelecer critérios de continuidade e diversificação, onde, além de perseguir resultados voltados ao desenvolvimento de competências, deve possibilitar momentos de ludicidade para todos os internos em associações assistenciais.