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7 Since we cannot consider aid as exogenous, testing indirect mechanisms while taking care of the endogeneity between aid and migration, turned highly demanding in terms of excluded restrictions, either by estimating two stage least squares with two endogenous variables (aid and the mechanism, e.g. income) or a system of three equations.
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Second, the main measure of renal function in this study was estimated GFR based on serum concentrations of creatinine, and not on independently verified clearance of an exogenous test molecule.
It's called the integrated exogenous antigen testing system, or iEAT — I'm sure that's just a coincidence.
To guarantee that health insurance is indeed exogenous, I tested for the possible endogeneity of insurance using the following two steps [ 17].
When the orthogonality conditions of the model were tested including these variables as exogenous, the C test indicated robust results.
Additionally, cysteamine first emerging as a blocker was proved to sensitize the ECL response of Ru (bpy 32+, which further amplified the ECL signal, avoiding addition of exogenous coreactants into testing solution.
This indicates that similar defects exist for retrograde traffic of both exogenous sterols we tested.
Cyclopamine and exogenous FGF9: To test if SHH and FGF9 could compensate for each other in Vegfa induction, exogenous FGF9 was added to cyclopamine treated lung explants for 48 hours.
If the null of exogenous growth is tested against the alternative of endogenous growth (or vice versa) by imposing overidentifying restrictions on the cointegrating vector, the results could offer empirical evidence of convergence or divergence in growth and income across countries.
We also tested exogenous vital stains, including Alexa488- α-bungarotoxin; the styryl pyridinium dye 4-Di-2-Asp; and a GFP conjugate of botulinum toxin Type A heavy chain (GFP-HcBoNT/A).
To validate the effect of exogenous ATP, we tested the mitochondrial uncoupler carbonylcyanide p-trifluoromethoxyphenylhydrazone (FCCP), which triggered a large lactate production, in physiological as well as low glucose.
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