CARES Commitment Savings for Smoking Cessation in the Philippines

Xavier Giné
Agusan del Norte Province in Mindanao
2,000 smokers aged 18 and older
2006 - 2008
Target group:
  • Adults
Outcome of interest:
  • Alcohol, tobacco, and drug use
Intervention type:
  • Commitment devices
  • Information
  • Savings
AEA RCT registration number:

Despite its serious health effects, smoking is extremely commonplace in the Philippines. In 2009, 28.3 percent of Filipinos aged 15 years or older were current smokers, and 22.5 percent smoked on a daily basis. Researchers evaluated the impact of a voluntary commitment savings program that allowed individuals to deposit a self-selected amount of their own money that would be forfeited if they did not quit smoking within six months. Results suggested that individuals who were offered the program were much more likely to quit smoking.

الموضوع الأساسي

Despite detrimental effects, people throughout the world habitually engage in damaging or inefficient habits such as smoking, eating poorly, or failing to save money. Experts believe that this is because people's preferences change over time: in the long-run an individual may wish to quit smoking, for example, but in the moment their preference for a cigarette may outweigh their desire to quit. Such behavior, known as time inconsistent preferences, may help to explain why people make inefficient choices that result in poor health or a lack of financial cushioning. Some researchers theorize that habits that have negative long-term effects can be discouraged by giving people commitment devices: contracts which constrain their future behavior, and may exact a financial penalty if they revert to bad habits.

سياق التقييم

Despite its serious health effects, smoking is extremely commonplace in the Philippines: in 2009, 28.3 percent of Filipinos aged 15 years or older were current smokers, and 22.5 percent smoked on a daily basis. Smoking is also a considerable expense, with the average surveyed smoker spending approximately 100 Philippine pesos (US$2) per week on cigarettes, nearly 15 percent of their monthly income. Even though it is a common behavior, 72 percent of survey respondents reported that they wanted to stop smoking at some point in their life, and nearly 45 percent indicated that they had tried to stop smoking within the last year. Survey responses suggest that their lack of success may be due to time inconsistent preferences: though 72 percent reported that they wanted to stop smoking at some point, only about 18 percent of people said that they wanted to stop smoking now.

In 2009, 28.3 percent of Filipinos aged 15 years or older were current smokers, and 22.5 percent smoked on a daily basis. Photo: junpinzon |

معلومات تفصيلية عن التدخل

Committed Action to Reduce and End Smoking ("CARES") is a voluntary commitment savings program. The basic design of the product allows a smoker to deposit a self-selected amount of his own money that will be forfeited unless he passes a biochemical test of smoking cessation. To enroll people in the CARES program, the Green Bank of Caraga identified regular smokers off the street and asked them if they wanted to participate in a short survey on smoking. All subjects received an informational pamphlet on the dangers of smoking, and a tip sheet on how to quit. After completing this baseline survey, subjects were randomly assigned to receive one of four offers:

  1. CARES with deposit collection: A minimum balance of 50 Philippine pesos (about US$1) was required to open a CARES account, and individuals were encouraged by marketers to deposit the money they would normally spend on cigarettes into this account each week. This group also received weekly visits from deposit collectors, saving them the weekly trip to the bank. All CARES clients were able to deposit into, but not to withdraw from these accounts, and the accounts yielded no interest, to discourage non-smokers from using them as a substitute for normal savings accounts.

  2. CARES without deposit collection: Same as above, except these clients had to go to a bank branch themselves to make deposits.

  3. Cue Cards: These individuals got to choose from among four wallet-sized cards depicting negative health consequences of smoking: premature babies, bad teeth, black lung, or a child hooked up to a respirator. They were encouraged by the marketers to keep them in a prominent location.

  4. Comparison: These individuals received no additional information.

Six months after the baseline survey, all survey respondents took a urine test to determine if they were still smoking. Individuals in the CARES treatment groups would receive their entire balance back if they passed the test but would forfeit it if they failed or refused to take the test. Non-clients (those assigned to the cues and comparison groups) were paid 30 Philippine pesos (US$0.60) for taking the six-month test, and all respondents were paid 30 Philippine pesos for taking another test twelve months after the baseline.

النتائج والدروس المستفادة بشأن السياسات

In total, about 11 percent of individuals who were offered CARES signed a contract. Individuals who reported wanting to quit, who were optimistic about quitting, and who already exhibited strategic behavior to manage their cravings (i.e., avoiding situations that made them want to smoke) were more likely to sign a contract. On the other hand, individuals who reported wanting to quit more than a year in the future, and who showed signs of being heavy smokers were less likely to sign a contract. Ninety percent of CARES clients opened with the minimum amount of 50 Philippine pesos, and 80 percent made additional contributions. The average client contributed about every two weeks, and after six months had a final balance of around 553 Philippine pesos, equal to approximately six months' worth of cigarette spending.

Individuals who were offered a CARES contract were 3.3 to 5.8 percentage points more likely to pass a urine test for nicotine after six months than those in the comparison group and were 3.4 to 5.7 percentage points more likely to pass after twelve months, a substantial effect considering that only 8.9 to 14.7 percent of comparison individuals passed the test. This represents an over-35 percent increase in the likelihood of smoking cessation compared to baseline. However, despite these large treatment effects, a surprisingly large proportion (66 percent) of smokers who voluntarily committed to CARES ended up failing to quit. Still, the results of the CARES program were far above the reductions in smoking associated with the cue card treatment, which had no effect on smoking cessation: though over 99 percent of clients offered the cue cards accepted them, fewer than half remembered the cards and knew where they had put them one year later, and only about 5 percent reported still using them to manage cravings. However, it is still not known how much of the CARES treatment effect was due to the financial commitment that all clients made and how much was due to the frequent contact that some clients had with deposit collectors.

Gin̩, Xavier, Dean Karlan, and Jonathan Zinman. 2010. "Put Your Money Where Your Butt Is: A Commitment Contract for Smoking Cessation." American Economic Journal: Applied Economics 2: 213-35.