The Crop Connection: Impact of Cell Phone Access on Crop Choice in Rural Pakistan
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1 The Crop Connection: Impact of Cell Phone Access on Crop Choice in Rural Pakistan Saher Asad Lahore University of Management Sciences June 20, 2016 ABCDE 2016 Saher Asad (LUMS) Crop Connection June 20, / 47
2 Motivation Cash crops can have positive impacts on development (World Bank, 2008; IFPRI,2013; FAO,2014) Cash crops are often highly perishable Profitability In developing countries - storage is limited, market linkages are weak Risk of high post-harvest losses deters production Can the cell phones mitigate this risk? Saher Asad (LUMS) Crop Connection June 20, / 47
3 This Paper Provides estimates for impact of cell phone access on crop choice along the perishability dimension Mechanisms Farmer-Trader Coordination (FTC) Price Information Effect (PIE) - (e.g. Jensen, 2007; Aker, 2010; Goyal, 2010; Muto and Yamano, 2009; Nakasone, 2013; Mitra et al., 2013) Weather Information Effect (WIE) - (e.g. Cole and Fernando, 2012; Fafchamps and Minten, 2012) Distinguish effects Income and Consumption Saher Asad (LUMS) Crop Connection June 20, / 47
4 Context: Pakistan Agriculture constitutes 21% of GDP in Pakistan Punjab(study region) is the hub of agriculture Farmers grow 4-6 crops in a year Farmers are constrained by storage and timely sale Traders are constrained by limited capacity and power outages Saher Asad (LUMS) Crop Connection June 20, / 47
5 Evidence from Field Before I had a cell phone I harvested my crop and then had to wait for a trader to buy my crops; now I talk to the trader and harvest my crops when he will buy it. - Farmer in Rural Pakistan I cannot buy an unlimited amount of crop in one day. The power keeps going out and I cannot store these crops for very long period. The retailers dont like to buy rotten crops. - Trader in a Mandi Farmers can adjust the watering schedule to adjust the harvest date up to 10 days. - Agricultural Expert Saher Asad (LUMS) Crop Connection June 20, / 47
6 Model Agriculture Household Model (De Janvry and Sadoulet, 2006; Dercon, 1996) highlights the role of coordination in farmer production choices Assumptions Baseline CellPhone Solving the model gives the following results Result 1: CellPhone ProbabilityofSale c SharetoPerishable c Result 2: CellPhone ProbabilityofSale nc SharetoPerishable nc Saher Asad (LUMS) Crop Connection June 20, / 47
7 Identification Strategy Cell Phone coverage is endogenous - heavily provided to rich areas Coverage Restricted from villages in 10 km of border with India - Dead Zone Enforced with: (a) Strategic Tower Placement; (b) Jammer Placement Does not coincide with the No Man s Land (500m) Spatial Regression Discontinuity India Legend International Border District Boundary Dead Zone Boundary Villages Without Cell Phone Coverage Villages With Cell Phone Coverage 1:1,250,000 Saher Asad (LUMS) Crop Connection June 20, / 47
8 Village Level Data Saher Asad (LUMS) Crop Connection June 20, / 47
9 Village Level Data Saher Asad (LUMS) Crop Connection June 20, / 47
10 Village Level Data Saher Asad (LUMS) Crop Connection June 20, / 47
11 Village Level Data Saher Asad (LUMS) Crop Connection June 20, / 47
12 Village Level Data Saher Asad (LUMS) Crop Connection June 20, / 47
13 Household Level Data Saher Asad (LUMS) Crop Connection June 20, / 47
14 Household Level Data Saher Asad (LUMS) Crop Connection June 20, / 47
15 Household Level Data Saher Asad (LUMS) Crop Connection June 20, / 47
16 Household Level Data Saher Asad (LUMS) Crop Connection June 20, / 47
17 Household Level Data Saher Asad (LUMS) Crop Connection June 20, / 47
18 Household Level Data Saher Asad (LUMS) Crop Connection June 20, / 47
19 Estimation Covariates are balanced Household Fuzzy RD for village data Village Sharp RD for household data Due to the sample size limitations I adopt a semi-parametric estimation method based on Dell(2010) Present results for quadratic, cubic and quartic polynomials in Euclidean distance and lat-long India Legend International Border District Boundary Dead Zone Boundary Villages Without Cell Phone Coverage Villages With Cell Phone Coverage 1:1,250,000 Saher Asad (LUMS) Crop Connection June 20, / 47
20 Discontinuity in Probability of Producing Perishable Crop Probability of Growing Extremely and Highly Perishable Crops Distance from Restriction Density Smoothness Saher Asad (LUMS) Crop Connection June 20, / 47
21 Discontinuity in Area Allocated to Growing Perishable Crops Area Under Extremely and Highly Perishable Crops Distance from Restriction Density Smoothness Saher Asad (LUMS) Crop Connection June 20, / 47
22 Is this a Major Crop in the Village? (Degree of Perishability of Crop) (Extremely & Highly) (Least) (Extremely & Highly) ( Least) (Probit) Cell Phone 0.31*** *** 0.12 (0.06) (0.08) (0.11) (0.16) (Quadratic in Distance from Restriction) Cell Phone 0.23*** *** 0.02 (0.03) (0.04) (0.03) (0.04) (Quadratic in Lat-Long) Cell Phone 0.24*** *** 0.09 (0.02) (0.09) (0.03) (0.07) Controls Y Y Y Y District Dummies, Crop Dummies, Dist Crop Dummies Y Y Y Y Number of Observations Size of Band Around Restriction 10km 10km 5km 5km Mean of Control Group p < 0.01, p < 0.05, p < 0.1 Saher Asad (LUMS) Crop Connection June 20, / 47
23 Percentage of Area Under Crop (Degree of Perishability of Crop) (Extremely) (Highly) (Least) (OLS) Cell Phone 0.28*** 0.19*** -0.48*** (0.08) (0.06) (0.18) (Quadratic in Distance from Restriction) Cell Phone 0.245*** 0.16*** *** (0.11) (0.02) (0.09) (Quadratic in Lat-Long) Cell Phone 0.265*** 0.18*** -0.37*** (0.08) (0.03) (0.06) Controls Y Y Y District Dummies, Crop Dummies, Dist Crop Dummies Y Y Y Number of Observations Mean of Control Group p < 0.01, p < 0.05, p < 0.1 Saher Asad (LUMS) Crop Connection June 20, / 47
24 Farmer Trader Coordination: Can the Farmer Sell Crops on First Trip to Market? (Degree of Perishability of Crop) (Extremely) (Highly) (Least) (Probit) Cell Phone 0.58*** 0.42*** 0.03 (0.16) (0.19) (0.07) (Quadratic in Distance from Restriction) Cell Phone 0.40*** 0.32*** 0.06 (0.07) (0.04) (0.19) (Quadratic in Lat-Long) Cell Phone 0.49*** 0.31*** 0.07 (0.02) (0.065) (0.17) Controls Y Y Y District Dummies, Crop Dummies, Dist Crop Dummies Y Y Y Number of Observations Mean of Control Group p < 0.01, p < 0.05, p < 0.1 Number of Days Saher Asad (LUMS) Crop Connection June 20, / 47
25 Farmer Trader Coordination: Percentage of Output Lost to Post-Harvest Losses? (Degree of Perishability of Crop) (Extremely) (Highly) (Least) (OLS) Cell Phone -0.37*** -0.21*** (0.13) (0.09) (0.14)) (Quadratic in Distance from Restriction) Cell Phone -0.21*** -0.15*** 0.04 (0.09) (0.07) (0.11) (Quadratic in Lat-Long) Cell Phone -0.25*** -0.13*** 0.05 (0.03) (0.045) (0.15) Controls Y Y Y District Dummies, Crop Dummies, Dist Crop Dummies Y Y Y Number of Observations Mean of Control Group p < 0.01, p < 0.05, p < 0.1 Saher Asad (LUMS) Crop Connection June 20, / 47
26 Weather Information Effect: Difference Between Actual and Optimal Plantation Date? (Degree of Perishability of Crop) (Extremely) (Highly) (Least) (OLS) Cell Phone -8.5*** -4.9*** 1.3 (1.85) (0.75) (1.14) (Quadratic in Distance from Restriction) Cell Phone -6.43*** -4.28*** (0.97) (0.84) (0.91) (Quadratic in Lat-Long) Cell Phone -4.73*** -3.18*** (1.15) (1.12) (0.97) Controls Y Y Y District Dummies, Crop Dummies, Dist Crop Dummies Y Y Y Number of Observations Mean of Control Group p < 0.01, p < 0.05, p < 0.1 Saher Asad (LUMS) Crop Connection June 20, / 47
27 Weather Information Effect: Log of Crop Yield (Degree of Perishability of Crop) (Extremely) (Highly) (Least) (OLS) Cell Phone 0.06*** 0.03*** 0.02 (0.03) (0.01) (0.08) (Quadratic in Distance from Restriction) Cell Phone 0.05*** 0.04*** 0.01 (0.01) (0.009) (0.02) (Quadratic in Lat-Long) Cell Phone 0.03*** 0.02*** (0.01) (0.006) (0.02) Controls Y Y Y District Dummies, Crop Dummies, Dist Crop Dummies Y Y Y Number of Observations p < 0.01, p < 0.05, p < 0.1 Saher Asad (LUMS) Crop Connection June 20, / 47
28 Price Information Effect: Percentage Difference Between Farmers and Market Price (Degree of Perishability of Crop) (Extremely) (Highly) (Least) (OLS) Cell Phone -0.34*** -0.38*** -0.29*** (0.14) (0.17) (0.05) (Quadratic in Distance from Restriction) Cell Phone -0.31*** -0.34*** -0.36*** (0.15) (0.16) (0.09) (Quadratic in Lat-Long) Cell Phone -0.29*** -0.35*** -0.26*** (0.11) (0.12) (0.07) Controls Y Y Y District Dummies, Crop Dummies, Dist Crop Dummies Y Y Y Number of Observations Mean of Control Group p < 0.01, p < 0.05, p < 0.1 Saher Asad (LUMS) Crop Connection June 20, / 47
29 Income and Consumption (Agricultural Income) (Consumption) (OLS) Cell Phone 0.17*** 0.14*** (0.05) (0.04) (Quadratic in Distance from Restriction) Cell Phone 0.10*** 0.08*** (0.03) (0.02) (Quadratic in Lat-Long) Cell Phone 0.13*** 0.10*** (0.05) (0.03) Controls Y Y District Dummies, Crop Dummies, Dist Crop Dummies Y Y Number of Observations p < 0.01, p < 0.05, p < 0.1 Saher Asad (LUMS) Crop Connection June 20, / 47
30 Income By Crop Category and Mechanism Saher Asad (LUMS) Crop Connection June 20, / 47
31 Robustness Checks Use of higher order polynomials Alternative identification strategy and external validity Full Country Radio test radio Pre-coverage placebo test Placebo Saher Asad (LUMS) Crop Connection June 20, / 47
32 Policy Implications and Conclusion Improving extension services - when to provide critical information? Post-harvest risk mitigation - coordination, post-harvest Insurance? Cell phone coverage makes farmers shift towards producing perishable cash crops Analysis of mechanisms suggest Farmer-Trader Coordination Effect dominates in economic importance Future work: Impacts on Traders, Impacts on Non-Agricultural Households Saher Asad (LUMS) Crop Connection June 20, / 47
33 THANK YOU Saher Asad (LUMS) Crop Connection June 20, / 47
34 Crop Profitability By Degree of Perishability Return Saher Asad (LUMS) Crop Connection June 20, / 47
35 Assumptions Return A1: 2 crops A2: Land normalized to 1 and all land cultivated A3: Extreme Perishability Assumption(EPA) A4: Participation Constraint (PC) holds A5: Fair Trader Assumption(FTA) A6: One Market A7: Utility Function is: U(c) = c ρ and ρ < 1 Saher Asad (LUMS) Crop Connection June 20, / 47
36 Baseline Case Return Based on FTA probability of sale when no one has cell phone is 1 θ = k Budget Constraint c = σ b Y p + (1 σ b )Y np Maximization gives σ b σ b = Ynp Y np+ Yp D 1 where D = [( k Yp Ynp 1 k )( Y np )] 1 1 ρ Saher Asad (LUMS) Crop Connection June 20, / 47
37 Case with Cell Phones Return Some fraction α gets cell phone access Those with cell phone; k = 1 Those without cell phone; k = 1 αθ θ αθ ; k < k σ c = 1 ; σ nc = Ynp Y np+ Yp D 1 where D = [( k 1 k )( Yp Ynp Y np )] 1 1 ρ Saher Asad (LUMS) Crop Connection June 20, / 47
38 Village Level Diff of Means Return Saher Asad (LUMS) Crop Connection June 20, / 47
39 Household Level Diff of Means Return Saher Asad (LUMS) Crop Connection June 20, / 47
40 Cell Phones versus Radios (Probability of Being a Major Crop in the Village) (Degree of Perishability of Crop) (Highly & Extremely) (Less & Least) (Highly & Extremely) (Less & Least) Radio (0.226) (0.212) (0.242) (0.016) R-Square Controls Y Y Y Y District FE, Crop FE and District-Crop FE Y Y Y Y Number of Observations 52,378 52,378 27,059 27,059 Sample Full Country Full Country Full Punjab Full Punjab Controls include percentage of area cultivated, pre-coverage distance from pucca road network, wealth measures like roof structure of majority of households in the village, elevation, access to agricultural credit and access to irrigation. The regression also includes set of district specific, crop specific and district-crop specific fixed effects. p < 0.01, p < 0.05, p < 0.1 Return Saher Asad (LUMS) Crop Connection June 20, / 47
41 Pre-Coverage Placebo Test (Probability of Being a Major Crop in the Village) (Degree of Perishability of Crop) (Highly & Extremely) (Less & Least) Cell Phone (0.03) (0.04) R-Square Controls Y Y District FE, Crop FE and District-Crop FE Y Y Number of Observations Controls include percentage of area cultivated, pre-coverage distance from pucca road network, wealth measures like roof structure of majority of households in the village, elevation, access to agricultural credit and access to irrigation. The regression also includes set of district specific, crop specific and district-crop specific fixed effects. p < 0.01, p < 0.05, p < 0.1 Return Saher Asad (LUMS) Crop Connection June 20, / 47
42 Farmers Lined Up at the Market to Sell Crops Saher Asad (LUMS) Crop Connection June 20, / 47
43 Perishability Ranking of Crops Extremely Perishable : Tomatoes, Oranges, Mangoes, Corn, Sugar Cane Highly Perishable : Onion, Garlic, Potato, Taro, Peas, Fresh Turmeric Least Perishable : Millet, Feed, Sorghum, Rice, Wheat, Cotton Saher Asad (LUMS) Crop Connection June 20, / 47
44 Density Smooth at Village Level Return Saher Asad (LUMS) Crop Connection June 20, / 47
45 Density Smooth at Household Level Return Saher Asad (LUMS) Crop Connection June 20, / 47
46 Conditional Correlation (Probability of Being a Major Crop in the Village) (Degree of Perishability of Crop) (Highly & Extremely) (Least) (Highly & Extremely) (Least) Cellphone 0.29*** *** 0.04 (0.004) (0.02) (0.002) (0.1) R-Square Controls Y Y Y Y District FE, Crop FE and District-Crop FE Y Y Y Y Number of Observations 52,378 52,378 27,059 27,059 Mean of Control Sample Full Country Full Country Full Punjab Full Punjab Controls include percentage of area cultivated, pre-coverage distance from pucca road network, wealth measures like roof structure of majority of households in the village, elevation, access to agricultural credit and access to irrigation. The regression also includes set of district specific, crop specific and district-crop specific fixed effects. p < 0.01, p < 0.05, p < 0.1 Return Saher Asad (LUMS) Crop Connection June 20, / 47
47 Mechanisms : FTC (Number of Days Between Harvest and Sale) (Degree of Perishability of Crop) (Extremely) (Highly) (Less and Least) (OLS) Cell Phone -8.9*** -6.5*** 2.3* (2.23) (1.56) (1.40) (Quadratic in Distance from Restriction) Cell Phone -6.13*** -5.34*** 0.51 (0.05) (0.12) (0.45) (Quadratic in Lat-Long) Cell Phone -6.96*** -6.15*** 1.23 (1.12) (1.55) (1.85) Controls Y Y Y District Dummies, Crop Dummies, Dist Crop Dummies Y Y Y Number of Observations Mean of Control Group p < 0.01, p < 0.05, p < 0.1 Return Saher Asad (LUMS) Crop Connection June 20, / 47
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