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Importance sampling is a popular Monte Carlo method used in a variety of areas in econometrics. When the variance of the importance sampling estimator is infinite, the…
Importance sampling is a popular Monte Carlo method used in a variety of areas in econometrics. When the variance of the importance sampling estimator is infinite, the central limit theorem does not apply and estimates tend to be erratic even when the simulation size is large. The authors consider asymptotic trimming in such a setting. Specifically, the authors propose a bias-corrected tail-trimmed estimator such that it is consistent and has finite variance. The authors show that the proposed estimator is asymptotically normal, and has good finite-sample properties in a Monte Carlo study.
The variance targeting estimator (VTE) for generalized autoregressive conditionally heteroskedastic (GARCH) processes has been proposed as a computationally simpler and…
The variance targeting estimator (VTE) for generalized autoregressive conditionally heteroskedastic (GARCH) processes has been proposed as a computationally simpler and misspecification-robust alternative to the quasi-maximum likelihood estimator (QMLE). In this paper we investigate the asymptotic behavior of the VTE when the stationary distribution of the GARCH process has infinite fourth moment. Existing studies of historical asset returns indicate that this may be a case of empirical relevance. Under suitable technical conditions, we establish a stable limit theory for the VTE, with the rate of convergence determined by the tails of the stationary distribution. This rate is slower than that achieved by the QMLE. The limit distribution of the VTE is nondegenerate but singular. We investigate the use of subsampling techniques for inference, but find that finite sample performance is poor in empirically relevant scenarios.
As numerous scholars have noted, the law takes a strikingly incoherent approach to adolescent reproduction. States overwhelmingly allow a teenage girl to independently…
As numerous scholars have noted, the law takes a strikingly incoherent approach to adolescent reproduction. States overwhelmingly allow a teenage girl to independently consent to pregnancy care and medical treatment for her child, and even to give up her child for adoption, all without notice to her parents, but require parental notice or consent for abortion. This chapter argues that this oft-noted contradiction in the law on teenage reproductive decision-making is in fact not as contradictory as it first appears. A closer look at the law’s apparently conflicting approaches to teenage abortion and teenage childbirth exposes common ground that scholars have overlooked. The chapter compares the full spectrum of minors’ reproductive rights and unmasks deep similarities in the law on adolescent reproduction – in particular an undercurrent of desire to punish (female) teenage sexuality, whether pregnant girls choose abortion or childbirth. It demonstrates that in practice, the law undermines adolescents’ reproductive rights, whichever path of pregnancy resolution they choose. At the same time that the law thwarts adolescents’ access to abortion care, it also fails to protect adolescents’ rights as parents. The analysis shows that these two superficially conflicting sets of rules in fact work in tandem to enforce a traditional gender script – that self-sacrificing mothers should give birth and give up their infants to better circumstances, no matter the emotional costs to themselves. This chapter also suggests novel policy solutions to the difficulties posed by adolescent reproduction by urging reforms that look to third parties other than parents or the State to better support adolescent decision-making relating to pregnancy and parenting.
In the light of the developing nature of the personal investment and financing domain any guide to the literature is inevitably going to be subjective: one individual…
In the light of the developing nature of the personal investment and financing domain any guide to the literature is inevitably going to be subjective: one individual might prefer a rational, analytical emphasis (reflecting, perhaps, an economic orientation), whilst another might favour an empirical orientation (reflecting real‐world patterns of human behaviour that may have significance for commercial exploitation). This guide contains elements of both these approaches, plus others, and draws on the available literature in a selective but multi‐disciplinary manner.
There can be few who will regret the departure of 1966. As he makes his way towards that dim hall where the years are supposed to sit on their granite columns there will be few sighs at the parting. The year has been ‘a holy terror’ to almost everybody. Contraction has been its forte and uncertainty its foible. There have been severe restraints on enterprise, the crushing of many hopes and an air of apathy verging on despair. Future historians may well describe contemporary events as taking place ‘in the year of the Freeze’, much as it was once common to say ‘in the year of the French Revolution’.
– The purpose of this paper is to provide a selected bibliography of recent resources on library instruction and information literacy.
The purpose of this paper is to provide a selected bibliography of recent resources on library instruction and information literacy.
Introduces and annotates English-language periodical articles, monographs and other materials on library instruction and information literacy published in 2013.
Provides information about each source, discusses the characteristics of current scholarship and describes sources that contain unique scholarly contributions and quality reproductions.
The information may be used by librarians and interested parties as a quick reference to literature on library instruction and information literacy.
On the occasion of the publication of the 20th volume of the Advances in Gender Research series, this chapter reviews the series goals and previous volumes and introduces…
On the occasion of the publication of the 20th volume of the Advances in Gender Research series, this chapter reviews the series goals and previous volumes and introduces the themes and chapters of the current one.
The chapter shows both continuity and change in approaches to theories, research methods, pedagogy, and praxis in gender studies.
Newer approaches, gender-centered, intersectional and global, offer a critique of older ways of gathering and understanding data, ways that respond to and are impacted by social change.
The chapter and the volume are intended to encourage further advances in gender research.
MOST librarians are, sooner or later, faced with the necessity of extending the library service to meet the needs of a growing town. The position of the central library is almost invariably in the centre of the town, and as the population increases the residential districts move further and further away from the business centre. To meet the requirements of the borrowers the library must move with them, and this is done by establishing smaller libraries in such parts of the town as the density of the population warrants.