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1871Hidden Launch Mix from Survivor Panel 1A fund database currently shows 54 live statistical-arbitrage funds and 18 live macro funds. Historical one-year survival rates for these styles were 90% for statistical-arbitrage and 60% for macro. Assuming the current live panel comes from one launch cohort, what fraction of the original launches were macro funds?统计简单essay未尝试免费1872Hidden Launch Mix from Survivor Panel 2A live manager database now contains 32 market-neutral funds and 24 credit relative-value funds. Historical survival rates for those styles were 80% and 50%, respectively. What fraction of the original launches were credit relative-value funds?统计简单essay未尝试面试订阅1873Displayed High-Turnover Share BiasA live fund panel shows 45 low-turnover funds and 15 high-turnover funds. Historical survival rates were 90% for low-turnover funds and 30% for high-turnover funds. By how many percentage points does the displayed live panel understate the original share of high-turnover launches?统计简单essay未尝试免费1874Original Launch Ratio from Differential SurvivalToday’s database contains 28 live discretionary funds and 42 live systematic funds. Historical survival rates were 40% for discretionary funds and 70% for systematic funds. What was the original launch ratio of discretionary funds to systematic funds?统计简单essay未尝试面试订阅1875Regional Launch Share ReconstructionA current hedge-fund database shows 36 live Asia funds and 24 live Europe funds. Historical survival rates were 60% for Asia funds and 80% for Europe funds. What fraction of the original launches were Asia funds?统计简单essay未尝试面试订阅1876Track-Record Age Bias 1As of end-2026, a database contains 45 surviving funds launched in 2024, 20 surviving funds launched in 2022, and 9 surviving funds launched in 2020. The corresponding survival rates were 90%, 50%, and 30%. By how many years does the average age in the live panel understate the average age across all original launches?统计中等essay未尝试面试订阅1877Track-Record Age Bias 2At end-2027, a manager database contains 54 surviving funds launched in 2026, 24 surviving funds launched in 2024, and 10 surviving funds launched in 2022. The survival rates for those vintages were 90%, 60%, and 40%. How many years does the live-panel average age understate the average age across all original launches?统计中等essay未尝试免费1878Track-Record Age Bias 3As of end-2028, a database shows 24 live funds launched in 2020 and 28 live funds launched in 2026. The survival rates for those two vintages were 40% and 80%, respectively. By how many years does the live-panel average age understate the true launch-universe average age?统计中等essay未尝试免费1879Full-Universe Average Launch YearAt end-2026, a live panel contains 18 funds launched in 2017 and 24 funds launched in 2021. The survival rates for those vintages were 30% and 80%, respectively. What was the average launch year across all original launches?统计中等essay未尝试面试订阅1880Pre-2020 Share Hidden by AttritionA database of currently live funds contains 12 funds launched before 2020 and 36 funds launched in or after 2020. The survival rates for those two groups were 25% and 75%, respectively. What share of the original launches occurred before 2020?统计简单essay未尝试面试订阅1881True Turnover of the Launch UniverseAmong currently live funds, 40 are low-turnover and 20 are high-turnover. Historical survival rates were 80% for low-turnover funds and 40% for high-turnover funds. Suppose low-turnover funds average 60% annual turnover and high-turnover funds average 180% annual turnover. What was the average turnover across the original launch universe?统计简单essay未尝试免费1882Momentum Loading Hidden by Differential SurvivalA live panel contains 30 value-oriented funds and 10 momentum-oriented funds. The historical survival rates of those styles were 75% and 25%, respectively. Suppose the average momentum loading is -0.1 for value-oriented funds and 0.7 for momentum-oriented funds. What was the average momentum loading across the original launches?统计简单essay未尝试免费1883Average Gross Leverage at LaunchA live manager panel shows 27 low-leverage funds and 18 high-leverage funds. Survival rates for those groups were 90% and 60%, respectively. Suppose low-leverage funds average 1.2x gross leverage and high-leverage funds average 2.4x gross leverage. What was the average gross leverage across the original launches?统计简单essay未尝试面试订阅1884Displayed Capacity Bias from Missing ClosuresA live database shows 28 small-capacity funds and 42 large-capacity funds. Survival rates for those groups were 40% and 70%, respectively. Suppose small-capacity funds average 1.0 billion of capacity and large-capacity funds average 3.0 billion. By how much does the displayed live-panel average capacity overstate the original launch-universe average capacity?统计中等essay未尝试面试订阅1885Hidden Capacity UnderstatementAmong currently live funds, 18 are low-capacity and 12 are high-capacity. Their survival rates were 90% and 30%, respectively. Suppose low-capacity funds average 0.5 billion of capacity and high-capacity funds average 2.5 billion. By how much does the displayed live-panel average capacity understate the original launch-universe average capacity?统计中等essay未尝试面试订阅1890Global Survival Rate from a Skewed Launch MixAt launch there were twice as many regional funds as global funds. Today, 18 regional funds and 18 global funds remain live. If the regional-fund survival rate was 45%, what was the global-fund survival rate?统计中等essay未尝试面试订阅1891Choose the Least Survivorship-Biased Fund PanelA researcher wants the 2016-2025 average return of all funds launched in 2016. Which data pull is least exposed to survivorship bias? A. Keep only funds that are still alive in 2025, then use their full back history. B. Keep funds alive on each evaluation date, but retroactively delete any fund once it later closes. C. Use a point-in-time panel that keeps every 2016 launch in history until its actual closure date and retains closed funds in the archive. D. Use only funds that are current index constituents in 2025. Give the best choice.统计简单essay未尝试免费1892Unbiased Denominator for Issuer Survival StudyYou want to estimate the default frequency of bonds issued in 2018. Which denominator is the least survivorship-biased? A. Only bonds still outstanding in 2026. B. Only bonds that traded in the last month. C. All bonds issued in 2018, including those that matured or defaulted later. D. Only bonds that are currently eligible for a benchmark index. Give the best choice.统计简单essay未尝试面试订阅1893Sampling Rule for Average Strategy LifetimeA quant team wants to estimate the average lifetime of strategies from launch to shutdown. Which sampling rule is least survivorship-biased? A. Sample only strategies that are live today. B. Sample strategies that were alive at any point after 2024. C. Sample all launched strategies and record each realized shutdown date, including strategies that already died. D. Sample only strategies with at least 36 months of history. Give the best choice.统计简单essay未尝试免费1894Point-in-Time Equity Universe ConstructionFor a monthly equity backtest, which universe construction is least survivorship-biased? A. Use today’s index constituents for the entire historical sample. B. Use monthly historical constituents and keep delisted names in the panel until their actual exit dates. C. Keep only stocks with complete price histories from start to finish. D. Drop delisted names as soon as their prices become noisy near bankruptcy. Give the best choice.统计简单essay未尝试面试订阅