AUSTIN, Texas — The Texas comptroller said Monday that the economic recovery is taking hold, producing higher than expected tax revenues and possibly resulting in a budget surplus in 2013. In a letter to the Legislature, state Comptroller Susan Combs said tax collections were on pace to produce a $1.6 billion budget surplus for the fiscal biennium ending in 2013. That means the state could earn $82.7 billion over the next two years, while the 2012-2013 budget is only $81.1 billion. That represents an 8.2 percent increase in state revenues over the 2010-2011 budget cycle.