" d itrom od ," i'a cont; it's prohibited by the law.so have, within this area, the per se violations-- things that are so improper from an economic model th they are prohibited without reason, without any opportunities to defend them. included in this area would be mt divisions, price fixing, horizontal or vertical arrangements among the firms thatould prohibit competition tween firms. >> section two of the sherma an thtrnolition, e-ther t ient toopolize or the actual act ofonopizin thtrnolition, anthis canccur in e-numb of dient wa for example, the have been issuesthe pa where a company controllg a large percent of the sports shoe marketevelopa gazine and thenuns a ortinghoe evua hpens rate eish the best. that not using just a tter product or ding a be mousetr approh sli, butn a schemeo at they capte the et without a bthe fairsstaaroh sli, butn th t sanct was inteed to eate. anwe knowhat aions the grocery chains appear to have taken. the question, of course, is d these actns vlate the sherman act? >> the grocers here would undoubtedly