One of our most cost –effective modes of data collection is interactive voice response (IVR), that uses a recorded voice to ask survey questions by telephone, in place of live interviewers. Respondents enter their answers by pressing the buttons on the keypad of their touchtone telephone. Apart from being more cost-effective, IVR surveying has several other advantages over traditional mail and telephone surveys. IVR survey results are immediately available and a large volume of surveying can be done in a short period of time. We have mastered all high-end programming techniques in use since the advent of traditional computer assisted telephone interviewing (CATI), namely: complex skip branching, response permutation, question rotation, mid-stream random sub-sampling, continuous numeric data entry, verbatim open-ended capture and sophisticated field practices (call backs, full call dispositions, replacement).