div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentnational-bureau-of-economic-research-nber-2020-3-20-created-date-6261998htmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: National Bureau of Economic Research NBER · 2020 3 20 · Created Date: 6261998 12:49:51 AM loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader035fdocumentsusreader035viewer202208141160b24a8c90bed45ce61e0e35html5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentnational-bureau-of-economic-research-nber-2020-3-20-created-date-6261998htmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: National Bureau of Economic Research NBER · 2020 3 20 · Created Date: 6261998 12:49:51 AM loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader035fdocumentsusreader035viewer202208141160b24a8c90bed45ce61e0e35html5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentnational-bureau-of-economic-research-nber-2020-3-20-created-date-6261998htmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: National Bureau of Economic Research NBER · 2020 3 20 · Created Date: 6261998 12:49:51 AM loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader035fdocumentsusreader035viewer202208141160b24a8c90bed45ce61e0e35html5thumbnails3jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=4Page 4button div class=trans-imageimg data-url=documentnational-bureau-of-economic-research-nber-2020-3-20-created-date-6261998htmlpage=4 data-page=4...