Ronald MacDonald is currently the Adam Smith Professor of Political Economy at the University of Glasgow. He is also a Fellow of the Royal Society of Edinburgh, Research Fellow of the CESifo Research Network Munich and an International Fellow of the Kiel Institute of Economics. He holds a BA in economics from Heriot Watt University, Edinburgh and an MA and PhD from the University of Manchester. He has published widely in the areas of macroeconomics, monetary economics and international finance in journals such as the Journal of Monetary Economics, the Journal of Money Credit and Banking, the Economic Journal and the European Economic Review. His recent books include Exchange Rate Economics: Theories and Evidence (2007); The Political Economy of Financing Scottish Government (2009, with C. Paul Hallwood); and Currency Union and Exchange Rate Issues (2010, with Abdulrazak Al Faris).

Rod Cross is the coauthor of "The Physics and Technology of Tennis" and has written extensively for the United States Racquet Stringers Association's (USRSA) "Racquet Sports Industry" and "Racquet Tech" magazines. He is a former associate professor in physics at the University of Sydney-Australia. Crawford Lindsey is the coauthor of "The Physics and Technology of Tennis "and the author of "The Book of Squash," He is the editor in chief of "Racquet Sports Industry" magazine and at Racquet Tech Publishing. He lives in San Diego, California.