@unpublished{Koplenig2014,
  author  = {Alexander Koplenig},
  title   = {ZIPFFIT: stata module to fit the Zipf distribution or the Zipf-Mandelbrot distribution by maximum likelihood. Stata program archived at Boston college’s software statistics components archive},
  year    = {2014},
  abstract  = {zipffit fits the 1 parameter Zipf distribution or the two parameter Zipf-Mandelbrot distribution by ML using a right truncated zeta distribution.},
  language  = {en}
}