Columbia grad students are on strike over pay changes and unmet contract demands. Some say they’re struggling to live off late payments and low wages.

Columbia grad students are on strike over pay changes and unmet contract demands. Some say they’re struggling to live off late payments and low wages.

An indefinite strike organized by the Student Workers of Columbia began on Wednesday at Columbia University after the union and administrators failed to reach an agreement in bargaining meetings on Monday and Tuesday. The strike — the fourth in four years — is the...