Urban and peri-urban aquaculture as an immediate source of food fish: Perspectives of Dhaka City,Bangladesh

This paper describes the present status of aquaculture activities in Dhaka City and its surrounding areas including the system of fish marketing and distribution and environmental and socioeconomic issues. Dhaka City contains over 10 million people and is expanding day by day. Demand of fish in the last 10 years has increased as a result of increases in population and income levels. The annual per capita consumption of fish is reported to drop by 0.5 kg since 1985. The reason for this decline is increased prices and decreased supply of fish. Fish supply to the city comes from catch in the rivers-estuaries and floodlands of Dhaka district, neighboring districts, imports from other areas and aquaculture in surrounding areas of the city. Considerable quantities of fish are imported from India, Myanmar and Thailand. Seasonal patterns are common both in supply and consumption of fish. Along with traditional rural household aquaculture, in recent years, urban and peri-urban aquaculture has also been popular. Three broad types of aquaculture activities are found in and around Dhaka City; these are polyculture of carp in ponds, monoculture of catfishs in ponds, and pen and cage aquaculture in open waters. The carp includes both Indian major carp and Chinese carp and some minor carp. The catfish group includes mainly Thai pangas (Pangasius sutchi). Tilapia (Oreochromis niloticus) is also widely popular among the farmers. The technology used for aquaculture is improved extensive to semi-intensive. Increasing demand for fish in the city markets has encouraged the expansion of peri-urban aquaculture with a corresponding increase in the proportion of farmed fish in the markets.     

Will a Risk-Averse Decision Maker Ever Really Prefer an Unfair Gamble? Sometimes,He Will

The comments of Horowitz (1998) on the Prakash, Chang, Hamid, and Smyser (1996) paper are specifically directed towards Lemma 4 of the original paper. This reply proposes that Horowitz fails to recognize that the conditions stated are only necessary but not sufficient, and solutions can be obtained for some specific utility function for a given level of wealth in the case of a neutral gamble and for a range of wealth for unfair gambles. We derive the conditions to show that a risk preference function that satisfies the restrictions of Lemma 4 can exist for a given level of wealth.     

Inflation uncertainty and economic growth: evidence from the LAD ARCH model

In this paper, we combined the panel data and least absolute deviation autoregressive conditional heteroscedastic (ARCH) (L ₁-ARCH) model to infer on the relationship between inflation uncertainty and economic growth in five emerging market economies. Two interesting findings emerged from the analysis; first, we confirmed that the inflation uncertainty has a significant and negative effect on economic growth. Second, inflation is also an important variable and it is detrimental to economic prospects in the fast-growing Association of Southeast Asian Nations (ASEAN) economies. All in all, the empirical findings suggest that greater stability in the economy may be desirable in order to stimulate economic growth in the region.     

Population Growth and the Local Provision of Services: The Role of Primary Schools in Portugal

Population Research and Policy Review - The shrinking population in many European regions has led to a debate on the relation between the local provision of services of general interest and the...     

COVID‐19: A threat to educated Muslim women's negotiated identity in Pakistan

This study attempts to explore how the lockdown/containment measures taken by the government during the COVID‐19 pandemic have threatened educated Muslim women's negotiated identity regarding wifehood and motherhood in urban Pakistan and how they struggle to reposition to reconstruct it. Through semi‐structured interviews, making an in‐depth comparative study of three differently situated cases (Muslim women), this study argues that the abnormal situation that has ensued from the pandemic has reinforced the vulnerability of women's nascent negotiated identity by landing them in a space where they are supposed by the normative structures to step back to carrying out their traditional responsibilities as ‘good’ wife and mother during the crisis. It has found that the pandemic has similarity in its impacts for the women in their familial lives, despite their being variously situated and resistive, due to the general religio‐culturally defined patriarchal social behaviour of the place (Pakistan) toward women and lack of action on the part of the state for implementing its laws of women's empowerment.     

Forging a Brazilian Islam: Muslim Converts Negotiating Identity in São Paulo

Converts form a growing portion of the Muslim community in São Paulo, Brazil. Often introduced to Islam through media representations, they turn to religion for a variety of reasons, including the desire to search for spiritual truth. This article will examine questions of identity that arise during the process of religious conversion, using data gathered from extensive fieldwork. Specifically, it will analyze how male converts view the place of Islam within the context of Brazilian society and how they reimagine concepts of personal identity through religious conversion. The study suggests that converts hold diverse points of view regarding the development of their spiritual identity, emphasizing both the challenges and benefits of being Muslim and practicing Islam in Brazil.     

Two-step calibration of design weights under two auxiliary variables in sample survey

Calibration on the available auxiliary variables is widely used to increase the precision of the estimates of parameters. Singh and Sedory [Two-step calibration of design weights in survey sampling. Commun Stat Theory Methods. 2016;45(12):3510–3523.] considered the problem of calibration of design weights under two-step for single auxiliary variable. For a given sample, design weights and calibrated weights are set proportional to each other, in the first step. While, in the second step, the value of proportionality constant is determined on the basis of objectives of individual investigator/user for, for example, to get minimum mean squared error or reduction of bias. In this paper, we have suggested to use two auxiliary variables for two-step calibration of the design weights and compared the results with single auxiliary variable for different sample sizes based on simulated and real-life data set. The simulated and real-life application results show that two-auxiliary variables based two-step calibration estimator outperforms the estimator under single auxiliary variable in terms of minimum mean squared error.     

Estimation of multivariate frailty models with varying coefficients

The complicated structures can be modeled more efficiently and their flexibility can be increased through frailty models with varying coefficients.Therefore, such models are proposed in this article. The real challenge is to estimate varying coefficients by the penalized partial likelihood without closed form. The Laplace approximation is used to solve this problem. These varying coefficients are fitted using B-splines. Moreover, the variances of random effects are estimated by maximizing an approximate profile likelihood. The performance of the proposed methods are assessed with simulation studies and real data. The results show that the methods proposed are better than the counterpart in literature.     

Divorce is a part of my life… Resilience, Survival, and Vulnerability: Young Adults' Perception of the Implications of Parental Divorce

A qualitative study among 22 young adults (20–25 years old) whose parents divorced during their childhood was conducted in Israel, using semi-structured, in-depth, open-ended interviews. Qualitative data analysis led to identification of three profiles, aiming at a grounded theoretical conceptualization. Three core themes were identified: the centrality of the family; short- and long-term implications of parental divorce and its relations to supportive coping resources; and perspective at young adulthood. Further analysis led to typifying participants by three profiles, which represent the grounded theoretical conceptualizations: resilience, survival, and vulnerability. The most prominent difference among the profiles was the relationships between participants and their parents, and their perception of ongoing parental responsibility. A thorough discussion of the results and their implications for future research, theory development, and practice are presented.     

Acceptance sampling plans based on truncated life tests for weighted exponential distribution

Gupta and Kundu proposed a new class of weighted exponential distributions using the idea of Azzalini. In this article, we develop an acceptance sampling plan for the weighted exponential distribution under a truncated life test. For various acceptance numbers, consumer’s confidence levels and values of the ratio of the experimental time to the specified mean lifetime, the minimum sample size necessary to ensure a certain mean lifetime are obtained. The operating characteristic function values and the associated producer’s risks are also presented. A numerical example is provided to illustrate the acceptance sampling plan.