If you dare to ask: self-perceived possibilities of Spanish fathers to reduce work hours

Time scarcity is a reality for most mothers and fathers of young children who work full-time. Though the Spanish law recognizes a specific right to a reduced schedule for care reasons, fathers very rarely make use of this policy. Many of them simply think that, in their current employment circumstances, they ‘can’t’ cut down on work hours. This analysis focuses on the subjective perception that employees have of their difficulty to reduce work hours. Using a nationally representative sample of Spanish employees in charge of young children, and drawing on intersectionality perspectives, we propose that several stratification systems (e.g. gender and economic structure) overlap framing the subjective experience of how easy or difficult it is to adopt a reduced schedule. We confirm that fathers in middle-level service occupations (e.g. clerical workers) may be those most likely to be ‘undoing gender’ at work, as they differ significantly from other fathers in their perception that for them it would be easier to reduce their work hours.     

Adding time to social movement diffusion

ABSTRACT

There is now a substantial literature on the diffusion of protest events, tactics, identities, and frames between locations and among movements. This paper asks how the patterns identified in this literature may change as the time scale of diffusion extends across single cycles of protest and beyond the life spans of individual activists. I focus especially on two types of differences: the changing weight of relational and non-relational channels of diffusion; and ways in which, over longer stretches of time, the mediation of diffusion by formal organizations, institutions, and public history works to filter the influence of past activism.     

A Year Then Forever: Personal Resolution Making and the Temporal Bridge of the Near Future

Based on in-depth interviews and drawing exercises with 25 resolution makers, this paper explores the use of time in structuring and enacting improvement projects of the self. Resolutions are intentional, identity-laden moments when people bring the future into the present. They provide a window into the identity work of the “near future”—an underresearched but fascinating site where individuals transition between what they see as an immediate, controllable future to a more distant one that is less certain. In attempt to mitigate the emotionally and cognitively daunting prospects of the distant future, resolution makers enlist time as a form of capital, constructing the “temporal bridge” of the near future by engaging in three interrelated processes: structuring and remembering, being flexible, and maintaining optimism.     

末世论与叶芝诗歌中的时间观

学界讨论叶芝诗歌作品时,大多考察叶芝的神秘主义和象征主义。叶芝诗歌蕴含丰富的时间主题,时间既有衰亡意象的直线发展性,又有永恒意象的圆形循环性,且从末世论这一视角出发,可发现诗人独到的历史循环观与战胜时间的方式。     

Are Mothers and Fathers Interchangeable Caregivers?

Abstract

Recent debates about same-sex marriage have raised questions concerning the interchangeability of mothers and fathers. This paper provides three pieces of empirical evidence that highlight the distinct role that fathers and mothers play in the home. First, we use time-use data to show that fathers and mothers provide different amounts of time to their children regardless of who is the breadwinner in the household. Second, we show that men and women choose different occupations, with men more likely to choose occupations that have a protective role and mothers more likely to choose an occupation with a nurturing role. Third, we find that children are much less likely to experience domestic violence and neighborhood violence when there is a father in the home.     

Business-Cycle Analysis With a Markov-Switching Model

This article explores the Hamilton Markov-switching model through an analysis of the business cycles of eight developed market economies. Forecasting and specification tests suggest only marginal improvements over linear autoregressive models. Yet filtered and smoothed conditional probabilities indicate turning points in business cycles that closely correlate with turning points from traditional methods. Tests regarding the asymmetry of business cycles reject the null of symmetry for most countries.     

Decomposition of a state-space model with inputs

This article shows how to compute the in-sample effect of exogenous inputs on the endogenous variables in any linear model written in a state–space form. Estimating this component may be either interesting by itself, or a previous step before decomposing a time series into trend, cycle, seasonal and error components. The practical application and usefulness of this method is illustrated by estimating the effect of advertising on the monthly sales of Lydia Pinkham's vegetable compound.     

On testing for independence between the innovations of several time series

Test statistics for checking the independence between the innovations of several time series are developed. The time series models considered allow for general specifications for the conditional mean and variance functions that could depend on common explanatory variables. In testing for independence between more than two time series, checking pairwise independence does not lead to consistent procedures. Thus a finite family of empirical processes relying on multivariate lagged residuals are constructed, and we derive their asymptotic distributions. In order to obtain simple asymptotic covariance structures, Möbius transformations of the empirical processes are studied, and simplifications occur. Under the null hypothesis of independence, we show that these transformed processes are asymptotically Gaussian, independent, and with tractable covariance functions not depending on the estimated parameters. Various procedures are discussed, including Cramér–von Mises test statistics and tests based on non‐parametric measures. The ranks of the residuals are considered in the new methods, giving test statistics which are asymptotically margin‐free. Generalized cross‐correlations are introduced, extending the concept of cross‐correlation to an arbitrary number of time series; portmanteau procedures based on them are discussed. In order to detect the dependence visually, graphical devices are proposed. Simulations are conducted to explore the finite sample properties of the methodology, which is found to be powerful against various types of alternatives when the independence is tested between two and three time series. An application is considered, using the daily log‐returns of Apple, Intel and Hewlett‐Packard traded on the Nasdaq financial market. The Canadian Journal of Statistics 40: 447–479; 2012 © 2012 Statistical Society of Canada     

Modelling Poisson marked point processes using bivariate mixture transition distributions

A class of bivariate continuous-discrete distributions is proposed to fit Poisson dynamic models in a single unified framework via bivariate mixture transition distributions (BMTDs). Potential advantages of this class over the current models include its ability to capture stretches, bursts and nonlinear patterns characterized by Internet network traffic, high-frequency financial data and many others. It models the inter-arrival times and the number of arrivals (marks) in a single unified model which benefits from the dependence structure of the data. The continuous marginal distributions of this class include as special cases the exponential, gamma, Weibull and Rayleigh distributions (for the inter-arrival times), whereas the discrete marginal distributions are geometric and negative binomial. The conditional distributions are Poisson and Erlang. Maximum-likelihood estimation is discussed and parameter estimates are obtained using an expectation–maximization algorithm, while the standard errors are estimated using the missing information principle. It is shown via real data examples that the proposed BMTD models appear to capture data features better than other competing models.     

Sildenafil versus continuous positive airway pressure for erectile dysfunction in men with obstructive sleep apnea: a meta-analysis

Objective.?To evaluate the effectiveness of sildenafil versus continuous positive airway pressure (CPAP) for patients with erectile dysfunction (ED) and obstructive sleep apnea (OSA).

Methods.?This is a meta-analysis of a randomized controlled trial. The main outcome measures for effectiveness were the percentage of successful intercourse attempts, International Index of Erectile Function (IIEF) domain scores (erectile function, EF) and the satisfaction levels of the patients and their partners with the treatment for ED.

Results.?Two randomized controlled trials totaling 70 patients were included. Meta-analysis results are as follows: after 12 weeks of treatment, patients under sildenafil demonstrated a significant advantage over under CPAP in terms of the percentage of successful intercourse attempts [OR?=?3.24, 95% CI (2.37–4.43)], EF scores [WMD?=?3.57, 95%CI (1.68–5.45)], and the satisfaction levels of the patients and their partners with the treatment for ED [OR?=?3.56, 95% CI (1.27–9.98)].

Conclusion.?Current clinical studies might confirm that both therapeutic methods were safe and effective, but sildenafil was superior to CPAP in the treatment of ED in men with OSA. We conclude that new therapeutic agents or a combination of the two methods should be studied further.