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Table 12 Robustness check for impact of receiving SSS payouts on amount of income received from work

From: The effect of non-contributory pensions on labour supply and private income transfers: evidence from Singapore

  (1) (2) (3) (4) (5) (6) (7) (8)
VARIABLES No leads Balanced Ethnic trends Flat-type trends Age FE WIS/ GST Abadie 1-1 matching
Received SS × Jan 25.11 25.67 31.62 27.42 38.28 66.82
(69.84) (70.04) (71.56) (69.72) (93.44) (52.85)
Received SS × Feb 24.20 29.53 28.24 32.68 42.70 59.67**
(34.10) (34.60) (34.30) (34.52) (38.15) (25.02)
Received SS × Mar 52.37 57.93 54.91 60.46 58.73 61.11*
(48.36) (48.56) (49.37) (48.96) (62.60) (34.55)
Received SS × Jan–Mar 40.73
P = 0.23
Received SS × announce-to-pay 82.24 97.51 97.31 97.72 102.0 148.6 93.11* 94.84*
(66.19) (79.63) (79.70) (82.68) (80.54) (111.1) (50.79) P = 0.06
Received SS × post-pay 52.42 69.03 67.14 70.97 75.13 101.6 83.42* 55.12
(55.47) (68.67) (69.09) (71.39) (70.13) (93.64) (45.21) P = 0.30
Observations 15,997 15,706 15,997 15,997 15,997 11,173 1468 369
R-squared 0.701 0.701 0.701 0.703 0.702 0.691
  1. Notes:
  2. 1Standard errors clustered at the household level in parentheses. ***, **, and * represent statistical significance at the 1, 5, and 10% level of significance respectively
  3. 2All values are reported at the individual and monthly level
  4. 3Columns (1)–(8) show results from additional robustness checks carried out. These checks are: (1) removal of the lead terms; (2) restricting the sample to a “balanced” panel, where each individual has at least one observation in the pre-announcement, announcement-to-disbursement, and post-disbursement periods; (3) allowing for ethnicity-specific time fixed effects; (4) allowing for flat-type-specific time fixed effects; (5) adding age fixed effects as a control; (6) adding receipt of additional welfare payments (Workfare Income Supplement; GST Vouchers) as a control—sample is smaller because this data is not collected every wave and not everyone responds every wave; (7) reweighting each observation by their propensity of receiving SSS as in Abadie (2005); and (8) DiD matching with a 1-1 nearest neighbour match. Eq. (1) describes the baseline model used in these checks
  5. 4For columns (1)–(6), the sample is restricted to respondents who are age-eligible for SSS (i.e. aged 65 and above in 2016), Singapore citizens, live in public housing flats, and with a propensity score of 0.2–0.8. The number of observations in these columns refers to the number of individual-month observations. For columns (7) and (8), the number of observations refers to number of respondents, and the sample is not restricted by the propensity score. The sample, however, is smaller than the full sample due to data availability issues specific to the estimation of (7) and (8)