To excerpt or not to excerpt

A thought occurs to me. Is it bet­ter to excerpt your blog posts on the home page, essen­tially giv­ing the reader a lit­tle teaser that he then fol­lows to the article’s page; or do we throw the entire text of the arti­cle onto the home page and be done with it?

Maybe if I had adver­tise­ments on this site, I would care more about page vis­its, and there­fore, I would have an incen­tive to get peo­ple to visit as many pages on this site as pos­si­ble by show­ing the teasers on the home page. But I have no ads.

So while I like the look of a page full of excerpts lead­ing to the full arti­cles — it looks so very news­pa­pery, is it good blog prac­tice to make a vis­i­tor click through?