The Centre for Disease Dynamics, Economics & Policy (CDDEP) has issued a report in collaboration with Johns Hopkins University and Princeton University, where it said that a national lockdown is not "productive" and could cause "serious economic damage". It advocated state-level lockdowns in the most affected states. Its models predicted that in the best case scenario, a peak of one million hospitalisations would be encountered in early June.[51][52][53][lower-alpha 1] In an op-ed in The New York Times, the CDDEP director Laxminarayan explained that if the national lockdown finds good compliance, it would reduce the peak infections in early May by 70 to 80 percent, but still 1 million would require hospitalization and critical care.