Results 121 to 130 of about 1,439,546 (351)
Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 32, Issue 12, Page 1926-1939, December 2022., 2022 Abstract Stellate sturgeon (Acipenser stellatus) is a species of great conservation concern throughout its range. Over the past century, it has experienced a dramatic decline in abundance and distribution in the Black Sea basin. Information regarding the genetic structure of the species is very limited in the region, despite its crucial importance for ...
Daniela Nicoleta Holostenco +16 more
wiley +1 more source
Evolution of family systems and resultant socio-economic structures [PDF]
arXiv, 2020 Families form the basis of society, and anthropologists have characterised various family systems. This study developed a multi-level evolutionary model of pre-industrial agricultural societies to simulate the evolution of family systems and determine how each of them adapts to environmental conditions and forms a characteristic socio-economic ...
arxiv
Agribusiness, EarlyView.ABSTRACT Africa's cultural and colonial heritage has profoundly segmented rice markets. Whereas in ancient centers of rice domestication, consumers maintained preferences for local rice consistent with their cultural heritage, preferences have shifted toward imported Asian rice in coastal areas around seaports, due to prior exposure to colonial import ...
Kofi Britwum, Matty Demont
wiley +1 more source
Italy’s Path to Very Low Fertility: The Adequacy of Economic and Second Demographic Transition Theories [PDF]
, 2008 David I. Kertzer +3 more
openalex +1 more source
Why we measure period fertility
, 2007 Four reasons for measuring period fertility are distinguished: to explain fertility time trends, to anticipate future fertility, to construct theoretical models and to communicate with non-specialist audiences.
Ní Bhrolcháin, Máire
core
Agribusiness, EarlyView.ABSTRACT This study investigates the financial literacy (FL) of Swedish farmers, its linkages to farmer characteristics, management accounting practices and farm outcomes by surveying Swedish Farm Accountancy Data Network farmers. Using item response theory, we expand the existing FL measurement specifically to the farming context, assess measurement ...
Uliana Gottlieb, Helena Hansson
wiley +1 more source
Parametric density-based optimization of partition in cluster analysis, with applications [PDF]
arXiv, 2013 We developed an optimal in the natural sense algorithm of partition in cluster analysis based on the densities of observations in the different hypotheses. These densities may be characterized, for instance, as the multivariate so-called "quasi-Gaussian distribution".
arxiv
Social Security, Demographic Trends, and Economic Growth: Theory and Evidence from the International Experience [PDF]
, 2001 Isaac Ehrlich, Jinyoung Kim
openalex +1 more source
New insights on the impact of coefficient instability on ratio-correlation population estimates [PDF]
, 2016 In this study we examine the regression-based ratio-correlation method and suggest some new tools for assessing the magnitude and impact of coefficient instability on population estimation errors. We use a robust sample of 904 counties from 11 states and
Swanson, David A, Tayman, Jeff
core +1 more source
TAXATION OF PERSONAL INCOMES IN ROMANIA: PRESENT AND PERSPECTIVES [PDF]
Buletin ştiinţific: Universitatea din Piteşti. Seria Ştiinţe Economice, 2017 The personal income tax is not only as an important revenue instrument but also as an instrument of national policy. Taxation of personal income in European Union countries is regulated usually by a progressive rate structure.
Daniela PIRVU +2 more
doaj