Testing Identifying Assumptions in Nonseparable Panel Data Models
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DOI: 10.1016/j.jeconom.2016.11.005
Abstract: Recent work on nonparametric identification of average partial effects (APEs) from panel data require restrictions on individual or time heterogeneity. Identifying assumptions under the “generalized first-differencing” category, such as time homogeneity (Chernozhukov et al., 2013),… read more here.
Keywords: panel data; testing identifying; nonseparable panel; identifying assumptions ... See more keywords
Non-destructive ultrasonic testing for identifying concealed weapons and analyzing internal chemical substances
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DOI: 10.1038/s41598-024-73141-0
Abstract: The management of unknown weapons obtained from warfare, military operations, and terrorist situations requires a series of nondestructive testing processes. This management process, which is aimed at collecting information on the nature of the weapons,… read more here.
Keywords: destructive ultrasonic; chemical; ultrasonic testing; testing identifying ... See more keywords