Irvin Iorden • Director of lnlormotion HOUSING SH ORTAGE BLAl· iED ON TENANTS IRVINGTON-ON~HUDSON, Nill YORK, Jan. 5 - - Hoarding by t enants has caused the present acute housing shortage , and not any action by property owners, says Dr. V. Orval vlatts, economist of the staff of Tho Foundation for Economic Education, in a study to be released this week under the title 11 So You Believe in Rent Control? 11 Dr. Hatts cites 1946 census bureau figures to sho\'l t hat the nati...