Brazil's economy rebounded at the start of the year, as a booming agricultural sector and a wave of government stimulus combined to lift household spending and offset the drag of tight financial conditions. The recovery hands President Luiz Inacio Lula da Silva a welcome economic tailwind as he prepares to seek another term, with a vote due later in the year that is shaping up as a referendum on his stewardship of Latin America's largest economy.

The expansion has been driven in part by agriculture, the sector that underpins Brazil's export earnings and that delivered a strong harvest, and in part by a deliberate loosening of the public purse. Lula's government has cranked up social aid and transfers to households, a strategy that has supported consumption even as the central bank has kept interest rates elevated to contain inflation, leaving monetary and fiscal policy pulling in opposite directions.

The president has paired the spending with a signature labour measure. Brazil's lower house approved a constitutional amendment to reduce the standard working week to 40 hours from 44, a change Lula intends to place at the centre of his re-election pitch. The proposal, popular with the trade unions that form part of his base, must still clear further legislative hurdles, but its advance gave the government a tangible win to campaign on.

The fiscal generosity has not been without cost or controversy. Economists have warned that the combination of rising public spending and stubborn inflation could complicate the central bank's task and unsettle investors wary of Brazil's debt trajectory, even as the near-term growth figures improve. The tension between stimulus today and stability tomorrow is likely to define the economic argument of the campaign.

Lula's economic strategy has run alongside an assertive development agenda in the Amazon, where his government has pressed ahead with infrastructure and energy projects that have drawn objections from environmental groups. The juxtaposition — social spending and growth on one hand, contested development on the other — captures the balancing act of a president seeking to consolidate his base while defending a record that critics attack from several directions at once.

With the election approaching, the rebound gives Lula a stronger hand than he held a year ago, when sluggish growth and high borrowing costs weighed on his standing. Whether the recovery proves durable, or whether the bill for the stimulus comes due before voters go to the polls, will help determine if the upswing translates into the political dividend the government is counting on.