Results 81 to 90 of about 3,490,280 (180)

Efficient Estimation of Average Treatment Effects under Treatment-Based Sampling, Second Version [PDF]

open access: yes
Nonrandom sampling schemes are often used in program evaluation settings to improve the quality of inference. This paper considers what we call treatment-based sampling, a type of standard stratified sampling where part of the strata are based on ...
Kyungchul Song
core  

Six Steps towards a Spatial Design for Large-Scale Pollinator Surveillance Monitoring

open access: yesInsects
Despite the importance of pollinators to ecosystem functioning and human food production, comprehensive pollinator monitoring data are still lacking across most regions of the world.
Niels Hellwig   +6 more
doaj   +1 more source

Urine sampling and collection system [PDF]

open access: yes
This specification defines the performance and design requirements for the urine sampling and collection system engineering model and establishes requirements for its design, development, and test.
Fogal, G. L.   +2 more
core   +1 more source

Diseño metodológico de la Encuesta Nacional sobre Violencia contra las Mujeres en México Methodological Design for the National Survey Violence Against Women in Mexico

open access: yesSalud Pública de México, 2006
OBJETIVO: Describir la metodología utilizada en la Encuesta Nacional sobre Violencia contra las Mujeres 2003 (ENVIM 2003) en México, junto con el diseño de investigación, la estimación y la selección de muestras, la definición de variables, los ...
Gustavo Olaiz   +5 more
doaj  

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