I don't understand how this would work. Specifically:

- Would alpha be a vector of coefficients, one for each personal characteristic? If so, why isn't there an i subscript? Surely there isn't just one coefficient for all of the personal characteristics....?
- Would beta just be a a coefficient for the PT variable?
- Why aren't there coefficients for the occupation and region vectors?
- It doesn't seem possible that this could add up to only one. If phi and lambda are vectors holding dummy variables (0 or 1), you could already have a total of 2 just with those two variables.