“…Research has demonstrated the extent and econometric implications of non-classical measurement errors in self-reported survey data on a range of topics, while also documenting the accuracy, feasibility, and cost implications of adopting direct measurement tools, such as GPS technology for plot area measurement and outline capture [79][80][81][82], crop cutting for crop yield estimation [83][84][85][86], high-frequency phone survey data collection for measuring household agricultural labor inputs [87,88], DNA fingerprinting for crop variety identification [89,90], physical activity trackers (i.e. accelerometers) for informing the measurement and analysis of labor productivity, effort, and poverty [91][92][93][94], smartphone applications for time use measurement, recording social interactions between respondents and interviewers, or real-time travel patterns [95][96][97][98][99], lowcost testing kits for the rapid measurement of water quality [100], and "web scraping" for automating the collection of prices for selected internet retailers, as opposed to relying exclusively on survey operations for the Consumer Price Index (CPI) [101].…”