Reference

Test statistics Function to estimate the ADF/SADF/GSADF test statstics
rtadf()	Estimate the ADF/SADF/GSADF test statistic
Inference Functions for calculating critical and p values based on response surface aproximation or Monte Carlo simulations
rtadfCval()	Returns critical values based on a response surface function approximation
rtadfPval()	Returns p-values based on a response surface function approximation
rtadfSim()	Simulate critical values and date-stamping threshold sequence
rtadfSimPar()	Simulate critical values and date-stamping threshold sequence in parallel
Data Data used in the examples
snp	S&P 500 price to dividend ratio index.