第78页

We  suspect  that  speech  recognition  people  prefer  to  report  the  larger
non-logarithmic  numbers  given  by  perplexity  mainly  because  it  is  much
easier  to 
impress  funding  bodies
  by  saying  that  “we’ve  managed  to  reduce  perplexity  from  950  to  only  540”  than  by  saying  that  “we’ve  reduced
cross  entropy  from  9.9  to  9.1  bits.”

论科研的辛酸。。。