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High frequency phone surveys for tracking food prices: Evidence from the KasuwaGo project
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DOI:10.1016/j.gfs.2025.100863.png)
Abstract
En 中文
Achieving global food security calls for real time monitoring of food prices and quality-checks on the data. Such price data can serve as early warning for natural disasters, climate shocks or policy changes. The removal of fuel and foreign exchange subsidies in Nigeria in 2023 as a case in point, created price shocks that disrupted the food system. This policy change resulted in higher transportation costs for farmers and food distributors, creating an affordability crisis for many consumers. We introduce a mobile-phone-assisted weekly price survey of key grain markets, spanning more than 100 markets and 27 states in Nigeria. We use 127,397 spatially distributed price data points from this survey to show the pattern of price increases for staple food products in Nigeria. The study demonstrates that phone calls to markets with reasonable quality-checks can provide comparable outcomes to traditional methods of monitoring market prices.
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