Alternative analyses that did not use a functional form, but instead used the data to determine the shape of the fit, demonstrated that a nonzero threshold could not, in fact, be excluded.
Using a functional approach, they cloned both forms of the 3' SLC6A4 UTR into plasmids; one construct encoded allele G and the other one allele T of rs3813034, and the remaining sequence was identical.
This study was designed to investigate whether neuronal nitric oxide mediates the actions of agmatine in morphine dependence by using mice lacking a functional form of this enzyme.
This paper presents the estimation of a cost function for HIV prevention services using two datasets, using a flexible functional form.
Age and years-to-death were fitted as categorical fixed effects rather than continuous covariates because our aim was to generate age-specific estimates and standard errors for each trait in order to compare them; fitting age and years-to-death as covariates would have required using a specific functional form (e.g. linear, quadratic) and not allowed us to generate age-specific standard errors.
We adapt the catalytic model of Gregson et al. [16], first, by using a lognormal functional form of incidence as proposed in Williams et al. [18] and, second, by fitting one survival parameter and three incidence parameters to yearly age-specific HIV-seroprevalence profiles of persons aged 15 49 years assuming homogeneity over time, grouped within three calendar periods.
Moreover, Savage's theorem does not rule out that an agent with preferences satisfying his axioms can be represented using an alternative functional form that better matches her decision making psychology.
We used prediction models for these intermediate complications using optimization procedures to fit observations from the UKPDS control arm to a functional form used in the original National Institutes of Health model (11).
We follow Diebold et al. (1994) and Filardo (1994) and use a logistic functional form for the transition probabilities and the composite leading indicator as a business-cycle predictor.
We used a Translog functional form which assumes inputs in levels, squares and cross variables.
