(Ph.D., Illinois). Professor Juhl's research is in the area of Econometrics. He develops new statistical techniques to measure economic relationships. He has published papers proposing new statistics designed to search for changes in behavior in previously stable economic variables. In addition, his research also focuses on specifying the mathematical form of economic relationships and searching for any departures from widely used models. Professor Juhl has proposed statistics to detect if it is possible in given situations to combine several different sources of data to improve inference. In recent work, he develops tests that search for correlation patterns in large collections of units that have been observed over time.