{"blocks": [{"key": "c1c42699", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "b233fa50", "text": "Pinterest home-feed diversity initiative: posts can belong to topics like animals, recipes, etc.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "eaebbfa1", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "f53b503a", "text": "What business benefits can come from increasing home-feed diversity? Propose several quantitative metrics to measure diversity of a user’s feed. For each metric, discuss possible biases and limitations. Consider the metric ‘percentage of posts from the same topic’—what bias does it carry? If you modify the ranking algorithm to improve diversity, design an experiment to test the change and define launch criteria.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "ea8cde11", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "6a04b307", "text": "Think entropy, Gini, coverage; discuss user satisfaction, engagement, exploration; outline A/B-test design and guardrail metrics.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}