This can be achieved by strategically introducing one or more passive concentration species into the numerical model where the concentration of species i at any point in the fluid is defined as
Alternatively, since the passive concentration species do not affect airflow patterns, the concentration distributions may be determined separately from known airflows, for example, as a post-processing step.
A technique for computing CIs numerically, based on tracking airflow with passive concentrations, is provided along with examples based on CFD simulations.
As an alternative economic interpretation, a non-granting firm (i.e., a censored observation in the Tobit model) would be 5.5% more likely to grant options for the same change in active concentration, but only 2.7% more likely for the change in passive concentration. For the CEO in isolation, the economic significance is even greater: from Model 4, given a firm that is granting options, a one standard deviation increase in active investor concentration would be associated with a $0.34 increase in stock-option sensitivity.
The point estimates of the coefficients on active ownership concentration are greater than the corresponding point estimates on passive concentration in every model, however, one cannot reject the null that the coefficients are equal for any of the models.
However, it seems I should have repeated this so-called passive concentration
several times a day for at least 10 days by which time my brain and body would become so relaxed and rejuvenated I would feel and look de-aged.