getTheta {chords}  R Documentation 
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 oildiscovery 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 
bin 
Bin degree counts. See Note. 
robust 
Should 
Value
A list including the following components:
log.beta_0 
The log of 
theta 

Note
If degree counts have been binned by initializeRdsObject
(for variance reduction), the same value has to be supplied to getTheta
for correct estimation.
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.
See Also
Estimate.b.k
,
initializeRdsObject
,
makeRdsSample