Abstract
IN THE BEGINNING , it was easy. The first global Top 50 ranking that C&EN compiled appeared on Nov. 5,1990. There were six columns in the table: rank, company, chemical sales, chemical sales as a percentage of total sales, chemical operating profits, and chemical operating profit margin. One column of text accompanied the table. Over the years, that basic rubric has expanded and become more complicated, but the process of compiling the rankings has remained the same. Some of the data included in C&EN's tables are provided by Alexander H. Tullo, a senior editor in C&EN's Northeast News Bureau, who compiles the top U.S. chemical company rankings every May. Jean-Francois Tremblay, head of the Hong Kong Bureau, provides data for companies in Asia. I compile the relevant data on European, Middle Eastern, and South African firms. Tremblay and I each construct a file of our companies' data in their national currencies. ...
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