Improving Paddy Rice Statistics Using Area Sampling Frame Technique

39 Pages Posted: 22 Feb 2019

See all articles by Anna Christine Durante

Anna Christine Durante

Asian Development Bank

Pamela Lapitan

Asian Development Bank

David Megill

Asian Development Bank

Lakshman Nagraj Rao

Asian Development Bank

Date Written: November 28, 2018

Abstract

Traditional sampling strategies for paddy rice statistics rely on outdated list frames, incomplete holding information, or administrative data that are prone to numerous biases. The objective of this study is to test the utility of an area frame developed using remote sensing data in three pilot provinces—Savannakhet (Lao People’s Democratic Republic), Ang Thong (Thailand), and Thai Binh (Viet Nam). Direct estimates of total paddy rice area and production are calculated from area frame using two methods––one involving measurement of plot size using a Global Positioning System instrument and the other utilizing a digitized map of farmer-identified plot boundaries on a high-resolution Google Earth image. A third method involving the calculation of ratio estimates using independent mesh-level measures is compared with the first two methods involving direct estimates, and with the estimates generated from administrative data from the countries. Our study finds that ratio estimation significantly improves the level of precision of paddy rice statistics. Substantial deviations are also observed between official statistics and the statistics generated through direct estimation.

Keywords: agriculture, sampling methods

JEL Classification: C83, O13, Q19

Suggested Citation

Durante, Anna Christine and Lapitan, Pamela and Megill, David and Rao, Lakshman Nagraj, Improving Paddy Rice Statistics Using Area Sampling Frame Technique (November 28, 2018). Asian Development Bank Economics Working Paper Series No. 565 (November, 2018). Available at SSRN: https://ssrn.com/abstract=3339173 or http://dx.doi.org/10.2139/ssrn.3339173

Anna Christine Durante

Asian Development Bank ( email )

6 ADB Avenue, Mandaluyong City 1550
Metro Manila
Philippines

Pamela Lapitan

Asian Development Bank ( email )

6 ADB Avenue, Mandaluyong City 1550
Metro Manila
Philippines

David Megill

Asian Development Bank ( email )

6 ADB Avenue, Mandaluyong City 1550
Metro Manila
Philippines

Lakshman Nagraj Rao (Contact Author)

Asian Development Bank ( email )

6 ADB Avenue, Mandaluyong City 1550
Metro Manila
Philippines

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