Modeling the effect of quota sampling on online fieldwork efficiency: An analysis of the connection between uncertainty and sample usage . Carlos Ochoa and Josep Miquel Porcar. Market, Opinion and ...

It recommended the use of probability sampling at all levels of respondent selection, and the elimination of quotas. There was, of course, another reason for this most famous of polling mistakes ...

China has issued an additional crude oil import quota of at least 5.84 million metric tons (116,800 barrels per day) to independent refiners for cargoes arriving by end-2024 and in early 2025 ...

A court ruling has sharply reduced a quota system for filling government jobs, after protests over the issue turned violent and were brutally suppressed. By Anupreeta Das and Saif Hasnat Anupreeta ...