As Israeli shelling resumed on Monday, Hamas rocket fire is on the rise, mostly intercepted by Israel's "Iron Dome".
If Hamas persists, it is partly out of political calculation, according to a specialist in the region.
The movement wants to show its leadership in the Palestinian territories.
The UN meets again this Tuesday, behind closed doors, to discuss the situation in Gaza.
Israeli bombing resumed on Monday, after a particularly bloody first week of conflict.
Hamas, for its part, is stepping up rocket fire: more than 3,000 in a week.
Rockets hitting Israel's "Iron Dome", a defense system that intercepts more than 95% of Palestinian fire.
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If Hamas persists, it is not just for military reasons.
In its own way, Hamas is pushing Israel to spend lavishly, each shot of the "Iron Dome" costing $ 50,000.
Over the past week, the system has therefore cost more than $ 150 million.
"A standoff for the Palestinian leadership"
For Khattar Abou Diab, a specialist in the region at the University of Paris-Sud, Hamas's calculation goes beyond the simple economic framework: it is also political.
"It is a showdown for the Palestinian leadership inside the territories", explains the specialist.
"Hamas wants to show that it is behind the Palestinians, either in Jerusalem or in Gaza, and to embarrass Mahmoud Abbas," he added.
Palestinian President Mahmoud Abbas and his movement, Fatah, are thus seen as incapable of defending the Palestinian cause.
Finally, the stake of these shots relates to regional influence.
The weapons of Hamas are supplied and financed in large part by Iran, Israel's great enemy.
Thus, each rocket departure is in a way signed Tehran.