getTheta:
Recover the "discoverability coefficient".
Description
Estimates the effect of the degree on the rate of sampling. Also known as the "coefficient of discoverability" in the oil-discovery literature [2].
Formally, we estimate $\theta$ and $\beta_0$ assuming that $\beta_k:= \beta_0 * k^\theta$.
Usage
getTheta(rds.object, bin=1, robust=TRUE)
Arguments
rds.object
A rds-object with a estimates component as returned by Estimate.b.k
bin
Bin degree counts. See Note.
robust
Should $\beta_0$ and $\theta$ be recovered from $\beta_k$ using a robust method (default) or not.
Value
A list including the following components:
A list including the following components:
References
[1] Berchenko, Yakir, Jonathan Rosenblatt, and Simon D. W. Frost. "Modeling and Analyzing Respondent Driven Sampling as a Counting Process."" arXiv:1304.3505. HTTP://arXiv.org/abs/1304.3505.
[2] Bloomfield, P., K.S. Deffeyes, B. Silverman, G.S. Watson, Y. Benjamini, and R.A. Stine. Volume and Area of Oil Fields and Their Impact on Order of Discovery, 1980. http://www.osti.gov/scitech/servlets/purl/6037591.