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Natural experiment — empirical study in which individuals/clusters exposed to the experimental and control conditions are determined by factors outside the control of the investigators (nature), but the process governing the exposures arguably resembles random assignment.
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Short descriptions es método de investigación empírica con asignación no controlada por el investigador machine-translated ar منهج بحثي تجريبي تحدده عوامل طبيعية خارج سيطرة الباحثين machine-translated ja 研究者が制御できない自然な要因によって実験群と対照群が決まる経験的研究手法 machine-translated de Untersuchungsmethode zur Einteilung von Probanden fr protocole expérimental pt método empírico em que as condições experimentais são determinadas por fatores naturais fora do controle dos investigadores machine-translated it metodo di ricerca empirica in cui le condizioni sperimentali sono determinate da fattori naturali indipendenti dai ricercatori machine-translated pl metoda badawcza oparta na warunkach naturalnie zbliżonych do losowego przydziału machine-translated