The term "Ragnar Anton Kittil Frisch" refers to a specific person, not a common English word. He was a Norwegian economist who lived from 1895 to 1973. He is well-known for his contributions to the field of econometrics, which combines economics, mathematics, and statistics to analyze economic data.
Ragnar Anton Kittil Frisch is an important figure in economics, particularly in the study of econometrics.