{"blocks": [{"key": "c4ce7123", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "078b373d", "text": "Evaluating the impact of expanding merchant variety or selection on consumer experience", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "23bd0425", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "b022fe2a", "text": "What success metrics would you use to measure merchant variety at merchant and consumer levels? How would you design and analyze an A/B test (or alternative) to quantify the effect of increasing selection?", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "80b23798", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "3c60ff73", "text": "Discuss diversity indices, conversion, retention; unit of randomization; guardrail metrics; heterogeneous effects.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}