RE: Kitco Commentary on Peru MiningThe author admits he is not a political expert, but if you read the article he lays out a good case how important mining is in the Peruvian economy, much too important, he believes, to mess up with nationalization.
It is likely there will be higher taxes, but taxes are currently lower than most Latin American countries, so this should not have a dramatic impact. Taxes became extremely low in the 1990s as they privatized to lure back the mining companies.