OAKVILLE, Ont. _ Tim Hortons Inc. (TSX:THI) is raising its quarterly dividend by about 23 per cent and spending up to $440 million over the next year to buy back its shares from the public market. The announcements came as the restaurant chain announced it had $898.5 million of revenue during the fourth quarter, up 10.7 per cent from a year earlier. However, the company's profit missed estimates. Its net earnings attributable to Tim Hortons shareholders were 69 cents, up from 65 cents a year before but below analyst estimates of 77 cents.