Thanks again, Bryan. I am sorry to keep on asking the same questions but just out of curiosity, in the webinar named "Intro to Choice-Based Conjoint with Lighthouse Studio: Part 1 Webinar", Brian McEwan and Megan Peitz mention that we don't have to put all price points in the attribute levels but we can extrapolate it later. So, my question was in the same line of thought.
I do understand what you mention about "not extrapolating" but isn't it possible that only after a specific price point, the respondent(s) will be willing to pay for a specific combination of service attributes based on the utilities captured even if it was not shown to them before. So, how would you advise to handle this then?
Secondly, for the constant part of the utility function, for example, I am referring to a specific research paper titled "Measurement of consumer preferences for bucket pricing plans with different service attributes" by Christian Schlereth and Bernd Skiera.
His paper and others in pricing research papers always mention that the utility function as a non-linear function which is described as below:
Utility (service in question, composite good) = a* (number of units of service in question) - (b/2 * (number of units of service in question)^2) + c + (price of composite good * units of composite good)
Here "c" refers to the usage independent utility (for zero quantity).
Also "c" can be considered as the constant of the regression equation.
I hope I could explain myself a bit. Please let me know if you need more information from my side. Looking forward to your advise.