The changing relationship between unemployment and total fertility

The aim of this paper is to investigate whether there has been a fundamental change in the relationship between economic conditions and fertility. We use panel data methods to study the short-term changes in total fertility and the unemployment rate in a range of Organisation for Economic Co-operation and Development (OECD) countries from 1957 to 2014. We find that although fertility was counter-cyclical before 1970, with good economic times being associated with lower fertility, since then it has become pro-cyclical, with good economic times being associated with higher fertility.     

Evaluating the Use of Commercially Available Wearable Wristbands to Capture Adolescents’ Daily Sleep Duration

Commercially available wearable devices are marketed as a means of objectively capturing daily sleep easily and inexpensively outside of the laboratory. Two ecological momentary assessment studies—with 120 older adolescents (aged 18–19) and 395 younger adolescents (aged 10–16)—captured nightly self‐reported and wearable (Jawbone) recorded sleep duration. Self‐reported and wearable recorded daily sleep duration were moderately correlated (r ~ .50), associations which were stronger on weekdays and among young adolescent boys. Older adolescents self‐reported sleep duration closely corresponded with estimates from the wearable device, but younger adolescents reported having an hour more of sleep, on average, compared to device estimates. Self‐reported, but not wearable‐recorded, sleep duration and quality were consistently associated with daily well‐being measures. Suggestions for the integration of commercially available wearable devices into future daily research with adolescents are provided.     

On statistical tests of functional connectome fingerprinting

Fingerprinting of functional connectomes is an increasingly standard measure of reproducibility in functional magnetic resonance imaging connectomics. In such studies, one attempts to match a subject's first session image with their second, in a blinded fashion, in a group of subjects measured twice. The number or percentage of correct matches is usually reported as a statistic, which is then used in permutation tests. Despite the simplicity and increasing popularity of such procedures, the soundness of the statistical tests, the power, and the factors impacting the test are unstudied. In this article, we investigate the statistical tests of matching based on exchangeability assumption in the fingerprinting analysis. We show that a nearly universal Poisson(1) approximation applies for different matching schemes. We theoretically investigate the permutation tests and explore the issue that the test is overly sensitive to uninteresting directions in the alternative hypothesis, such as clustering due to familial status or demographics. We perform a numerical study on two functional magnetic resonance imaging (fMRI) resting‐state datasets, the Human Connectome Project (HCP) and the Baltimore Longitudinal Study of Aging (BLSA). These datasets are instructive, as the HCP includes technical replications of long scans and includes monozygotic and dizygotic twins, as well as non‐twin siblings. In contrast, the BLSA study incorporates more typical length resting‐state scans in a longitudinal study. Finally, a study of single regional connections is performed on the HCP data.     

Missing from the Conversation: Sexual Risk Factors Across Young People by Gender Identity and Sexual Orientation

Abstract

Objectives: Lesbian, gay, bisexual, and queer/questioning (LGBQ), and transgender/nonbinary (trans/NB) youth experience health disparities. Much research combines gender identity with sexual orientation or siloes them, ignoring intersections. Methods: Logistic regressions with representative data from 2015 Healthy Kids Colorado Survey (n?=?15,970) explores sexual risk. Results: Findings indicate LGBQ and trans/NB youth have differential levels of sexual risk (drugs during sexual interactions, not using condoms) compared to cisgender heterosexual peers. Other identities, mental health, and bullying are also related. Conclusions: There is a need for culturally responsive bullying prevention, mental health support, education, and sexual health services for marginalized populations.     

On the invariance of accounting principles to business models: a discussion of the Singleton-Green and Page articles

Let me first begin by saying that I agree in general with Brian’s proposition that the theory of the firm provides insights into requisite financial reporting systems. I also agree with Mike’s characterization of business models as diverse, subjective, and mostly aspirational and if I may add, essentially vacuous. I disagree with the notion that financial reporting and recognition and measurement principles should be tailored to business models. Rather, I shall make the argument that recognition and measurement principles should be invariant to diverse business models. Indeed, the theory of the firm would suggest universal recognition and measurement principles that apply independently of the business models. The role of business models, I contend, is to facilitate proper quantifications—the required output of applying the universal recognition and measurement principles.     

THE SHIFTS IN LEAD-LAG PROPERTIES OF THE U.S. BUSINESS CYCLE

We document shifts in the lead-lag properties of the U.S. business cycle since the mid-1980s. Specifically, (1) the well-known inverted leading indicator property of real interest rates has completely vanished; (2) labor productivity switched from positively leading to negatively lagging output and labor inputs over the cycle; and (3) the unemployment rate shifted from lagging productivity negatively to leading positively. Many contemporary business cycle models produce counterfactual cross-correlations revealing that popular frictions and shocks provide an incomplete account of business cycle comovement. Determining the underlying sources of these shifts in the lead-lag properties and their consequences for macroeconomic forecasts is therefore a promising direction for future research. (JEL E24, E32, E43)     

What is the leanness level of your organisation in lean transformation implementation? An integrated lean index using ANP approach

We develop a lean index to assess the leanness level of the organisation in sustaining lean transformation. This ‘lean index’ is developed from theory, and is quantified using a multi-criteria approach i.e., analytic network process (ANP). This index provides a useful measure for sustainable lean performance because it adopts a holistic approach of performance measurement based on the socio-technical perspective which considers the interdynamics of human, system and technology.