3 ms·
No they're perfectly legal. The author is giving away the booklet for free (its only 14 pages). See the bottom half of this page: http://efficientfrontier.com
by martincmartin 10y ago
No they're perfectly legal. The author is giving away the booklet for free (its only 14 pages). See the bottom half of this page: http://efficientfrontier.com/ef/0adhoc/2books.htm http://efficientfrontier.com/ef/0adhoc/2books.htm