Results 21 to 30 of about 1,321,254 (310)

An economic effect assessment of extension services of Agricultural Extension Model Sites for the irrigated wheat production in Iran

open access: yesScientific Reports, 2023
Agricultural extension is a key policy to accomplish sustainable agricultural development by improving farmers’ knowledge. Agricultural Extension Model Sites (AEMSs) is a new agricultural extension approach for empowering farmers in Iran.
Mohammad Shokati Amghani   +2 more
doaj   +1 more source

Fertility Transitions Along the Extensive and Intensive Margins [PDF]

open access: yesAmerican Economic Review, 2012
By allowing for an extensive margin in the standard quantity-quality model, we generate new insights into fertility transitions. We test the model on Southern black women affected by a large-scale school construction program. Consistent with our model, women facing improved schooling opportunities for their children were more likely to have at least ...
Daniel Aaronson   +2 more
openaire   +3 more sources

Wet season upwelling and dry season chlorophyll-a describe interannual growth rates of Porites in southern China.

open access: yesPLoS ONE, 2014
Southern China hosts coral communities in marginal environments that are characterized by low linear extension rates, low coral cover and/or no reef formation, thus providing natural laboratories to study coral communities with below average growth rates.
Teng Teng Yang   +1 more
doaj   +1 more source

Decompositions of Marginal Homogeneity Model Using Cumulative Logistic Models for Multi-Way Contingency Tables

open access: yesRevstat Statistical Journal, 2007
For square contingency tables with ordered categories, Agresti (1984, 2002) considered the marginal cumulative logistic (ML) model, which is an extension of the marginal homogeneity (MH) model.
Kouji Tahata   +2 more
doaj   +1 more source

A Survey of Spatial Extremes

open access: yesRevstat Statistical Journal, 2012
We survey the current practice of analyzing spatial extreme data, which lies at the intersection of extreme value theory and geostatistics. Characterizations of multivariate max-stable distributions typically assume specific univariate marginal ...
Daniel Cooley   +6 more
doaj   +1 more source

Characterization and formation mechanism of the basin-marginal deltas in the Paleogene Qiongdongnan Basin, Northwestern South China Sea

open access: yesEnergy Exploration & Exploitation, 2020
In this study, based on seismic profiles, complemented with boreholes and well logs, two types of deltas are recognized in the Paleogene Qiongdongnan Basin, namely fan deltas and braided river deltas, and their temporal–spatial evolution characteristics ...
Guangzeng Song   +4 more
doaj   +1 more source

Subduction‐Induced Back‐Arc Extension Versus Far‐Field Stretching: Contrasting Modes for Continental Marginal Break‐Up

open access: yesGeochemistry, Geophysics, Geosystems, 2021
Continental break‐up is an ingredient of plate tectonics and the Wilson cycle. During the evolution of the Tethyan Realm since the Paleozoic, a series of ribbon‐like (micro‐)continents are split from the Gondwana and drifted northwards to the Eurasian ...
Shuting Yang   +4 more
doaj   +1 more source

Extensions of the locational marginal price theory in evolving power systems: A review

open access: yesIET Generation, Transmission & Distribution, 2022
The locational marginal price (LMP) theory is the foundation of nowadays electricity markets. With the rapid growth of intermittent renewable generation, new features are emerging in power systems, such as the uncertainty of power supply, the scarcity of
Zhenfei Tan   +3 more
doaj   +1 more source

Macroeconomics of Extensive Margins: A Simple Model [PDF]

open access: yesSSRN Electronic Journal, 2011
How do monopolistically competitive industries react to shocks in the context of a New Keynesian macro model? I bridge macroeconomics and trade theory by considering market dynamics. I use an analytically tractable closed-economy model with endogenous entry of firms and show the implications of markets structure for the transmission of real shocks on ...
openaire   +2 more sources

Dataset on measuring perception about fertilizer subsidy policy and factors behind differential farm level fertilizer usage in Bangladesh

open access: yesData in Brief, 2019
The dataset explicates farmer׳s perceptions about fertilizer subsidy policy in Bangladesh and the factors that affect farm level fertilizer usage. Primary data were collected from 300 farm households from three regions of the country belonging to four ...
Mahmuda Nasrin   +2 more
doaj   +1 more source

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