One observable determinant of this preference heterogeneity is the degree of exposure of individuals to health risks relating to water quality, as proxied by the type of recreational activity they undertake.
Clearly the most important assumption is the stability and transferability of the estimated structural relationship between observable flows and its determinants.
Through this collective experience, reflections on inadequacies of current theoretical and methodological approaches fuelled a focus on the social determination of health, observable in distinct contexts, and not the excessive examination of isolated determinants.
Determinants are not directly observable but can be measured indirectly.
The effects of these social determinants on health are less directly observable than bacteria in a Petri-dish and therefore require interventions that are distinctly different from a drug or vaccine, operating at a socio-ecological rather than simply biological level.
We selected predictors based on a priori hypotheses of determinants of health behavior, including unobservable risk preferences vis-à-vis the risk game choice and observable sociodemographic characteristics.
Change is observable time.
Second, obesity is easily observable.
Only the latter is observable.
