Comorbidity was measured using hospital events data and was classified using the Elixhauser instrument; effects on survival of individual comorbid conditions from the Elixhauser instrument were also assessed.
Furthermore, there was a specific interest in the analyses of informant effects (parent vs. teacher ratings) and diagnostic instrument effects (interview vs. questionnaire) on frequencies of each of the 18 DSM-IVADHD symptoms.
One potential concern to keep in mind is that if the instruments have differential effects on their corresponding endogenous variables, the variable with the weaker instrument will have a greater disturbance term (Wong & Law, 1999).
Validity is not assured if the excluded instruments have direct effects on earnings beyond those flowing indirectly through Spanish proficiency.
The econometric results suggest that when the policy mix is characterised by a more balanced use in demand-pull and technology-push instruments, its positive effects on eco-innovation tend to be greater.
Nevertheless, it is concluded that the information on the continuous performance of different policy instruments and their effects on the introduction and dissemination of new energy technologies, provided by this evaluation approach, is essential for an improved adaptation and implementation of energy and climate policy.
Third, the Mendelian randomisation approach may be compromised if genetic variants used as instruments have multiple effects on phenotype (pleiotropy) or if the variants are in linkage disequilibrium with another genetic variant, that influences the pathway of interest in the opposite direction.
Similarly, Not Real experiments with new textures, instruments and effects, spurred on by the fact that, this time around, they recorded and produced it themselves.
"Learning to play an instrument has demonstrable effects on intelligence and, when children play music together, teaches them about cooperation and working together".
Product and brand management related instruments display the strongest effects on most outcome variables, whereas price, communication, service and incentive management instruments affect only selected outcomes.
