Subjective Well-Being Score
Do WEGo countries have higher subjective well-being scores? To determine if there are statistically significant differences, the Shapiro-Wilk normality test was conducted on three groups to first test whether they are normally distributed: (1) WEGo members, (2) WEGo hubs where collaboration towards building a Wellbeing Economy take place and (3) the rest of the OECD countries that have no activity related to Wellbeing Economy. Normality needs to be assumed first to conduct ANOVA, otherwise Kruskal-Wallis Test is conducted as it is a non-parametric method.
The null hypothesis for a Shapiro Wilk test is that there is no difference between your distribution and a normal distribution. All three groups had p-value greater than 0.05, indicating that the data sets are normally distributed. Analysis of Variance (ANOVA) was then conducted to compare the means of the groups and with a p-value of 0.00108, a highly statistically significant difference between the groups was confirmed. In other words, the variation in subjective well-being scores is unlikely to have occurred by chance and WEGo members have a higher mean. Minimum, median, and maximum scores were also higher as showcased in the boxplot below.
One of the unsupervised learning methods for machine learning is hierarchical clustering, and when used for subjective well-being, 3 clusters were identified by cutting the tree at the height of 2. Except for the United Kingdom, all of the WEGo countries were grouped together, demonstrating a high degree of similarity. Out of the 9 WEGo Hub OECD countries, 5 were in cluster 1 with WEGo countries and 4 were in cluster 2 with the United Kingdom. Cluster 3 had entirely non-WEGo OECD members. Since clustering works by finding the most similar objects, the outcome highlights a potential divergence in subjective well-being scores between WEGO and non-WEGO countries and potential members to join the wellbeing economy movement.
Sustainable Development Goals
Do WEGo countries have higher Sustainable Development Goal scores? Based on the Shapiro-Wilk normality test, group 3 (rest of OECD) did not have normally distributed data. Kruskal-Wallis rank sum test was conducted instead of ANOVA to compare median scores of the three groups: with a p-value (0.4492) greater than the conventional threshold of 0.05, it failed to reject the null hypothesis. In other words, there was no statistically significant difference between the groups being compared. However, it is still important to note that WEGo countries did have higher minimum, mean, median, and maximum scores than the other two groups.
Next, are any of the 17 SDG Goal score differences statistically significant for WEGO countries compared to the rest of the OECD countries?
Goal 3 (p-value: 0.04619), Goal 5 (p-value: 0.00375), and Goal 11 (p-value: 0.02534) showed statistically significant differences among WEGo, WEGo hub, and the rest of the OECD countries. Higher mean and median scores were found in Goal 1, Goal 3, Goal 5, Goal 6, Goal 7, Goal 9, Goal 10, Goal 11, Goal 14, Goal 16, and Goal 17. In other words, WEGo countries had 11 out of 17 SDG goal mean and median scores higher than non-WEGO OECD countries, out of which 3 were statistically significant: Goal 3 (Good Health and Well-Being), Goal 5 (Gender Equality), and Goal 11 (Sustainable Cities and Communities).
It is important to note that Goal 14 should be viewed with caution as there were more than 10% of missing data originally. However, the three statistically significant results highlight WEGo potential. For instance, even though Norway (non-WEGO) is the only country to achieve Goal 3 (Sustainable Development Report), the Kruskal-Wallis rank sum test suggested that there is strong evidence that WEGo countries perform differently from non-WEGo OECD members with a higher median score. New Zealand is the only country in the world to achieve SDG Goal 11 Sustainable Cities and Communities (Sustainable Development Report), which may have contributed to the results seen in the analysis.
Correlation Between SDG and Subjective Well-Being Scores
Are there any correlations between SDGs and subjective well-being scores for data reported in 2024?
There is a strong positive correlation between subjective well-being score and Goal 5 (Gender Equality) with a correlation coefficient of 0.7428. There is a moderate positive correlation between subjective well-being score and the following SDG goal scores:
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Goal 1 (No Poverty)
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Goal 3 (Good Health and Well-being)
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Goal 9 (Industry, Innovation and Infrastructure)
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Goal 10 (Reduced Inequalities)
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Goal 11 (Sustainable Cities and Communities)
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Goal 16 (Peace, Justice and Strong Institutions)
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Goal 17 (Partnerships for the Goals)
Correlation between subjective well-being score and Goal 3 should be dismissed since the former is used as an indicator calculated for Goal 3; in total, there are 7 SDG goals positively (strong and moderate) correlated. There is a moderate negative correlation between subjective well-being and Goal 12 and Goal 13. This aligns with Jan-Emmanuel De Neve and Jeffrey D. Sachs' observation in 2020 when they also found SDGs 12 (Responsible Consumption and Production) and 13 (Climate Action) being negatively correlated with well-being. It is also important to note that in the correlation plot above, SDG Goal 3 (Good Health and Well-being) is positively correlated to other SDG goals except Goals 12, 13, 14 (Life Below Water), and 15 (Life on Land).
Variable Importance
If we build separate machine learning models based on WEGo associations to predict subjective well-being, will the variable importance results show different SDG indicators? The Lasso regression model, random forest, extreme gradient boosting, support vector machine, and K-nearest neighbor models were used to assess the relative importance of SDG indicators in predicting subjective well-being scores. Extreme Gradient Boosting had the lowest RMSE and MAE for WEGo, WEGo Hubs, and Non-WEGo OECD country groups for both training and test data.
Three variable importance plots based on WEGo associations were generated based on the best performing model, Extreme Gradient Boosting. The model’s coefficients offer insights into which SDG indicators are most influential in predicting subjective well-being. For WEGo countries, SDG indicator ‘n_sdg2_obesity’ (The percentage of the adult population that has a body mass index of 30kg/m² or higher) emerged as the strongest predictor, followed by SDG indicator ‘n_sdg3_matmort’ (The estimated number of women, between the age of 15 and 49, who die from pregnancy-related causes while pregnant or within 42 days of termination of pregnancy, per 100,000 live births) and ‘n_sdg7_renewcon’ (The share of renewable energy such as wind/solar in the total final energy consumption). For WEGo Hub countries in the OECD, ‘n_sdg8_unemp’ (Unemployment rate % of total labor force, ages 15+), ‘n_sdg12_explastic’ (The average annual amount of plastic waste exported over the last 5 years expressed per capita), and ‘n_sdg16_admin’ (Timeliness of administrative proceedings) had significant coefficients. For Non-WEGo OECD countries, SDG indicators ‘n_sdg8_rights’ (Rating whether fundamental labor rights are effectively guaranteed, worst 0–1 best), ‘n_sdg12_pollimp’ (Air pollution associated with imports), and ‘n_sdg3_traffic’ (Traffic deaths per 100,000 population) stood out.
Only 3 SDG indicators were present in all three models: ‘n_sdg8_unemp’ (Unemployment rate), ‘n_sdg1_lmicpov’ (Poverty headcount ratio at $3.65/day), and ‘n_sdg16_rsf’ (Press Freedom Index). While WEGo country model had 5 SDG indicators for Goal 3 (Good Health and Well-being), WEGo hub country model and Non-WEGo country model had 2 each.
Table 1
SDG Goal 3 Indicators Found in Predictive Models’ Variable Importance Results
WEGo Model Result
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Indicator Description
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WEGo Hub Model
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Indicator Description
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n_sdg3_matmort
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Maternal mortality rate
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n_sdg3_fertility
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Adolescent fertility rate
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n_sdg3_neonat
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Neonatal mortality rate
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n_sdg3_u5mort
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Mortality rate, under-5
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n_sdg3_vac
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Surviving infants who received 2 WHO-recommended vaccines
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Non-WEGo Model
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Indicator Description
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n_sdg3_u5mort
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Mortality rate, under-5
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n_sdg3_traffic
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Traffic deaths
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n_sdg3_tb
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Incidence of tuberculosis
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n_sdg3_uhc
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Universal health coverage index of service coverage
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The results may be surprising, given that the WEGo country model encompasses 4 indicators related to mortality rate of women and children specifically and the WEGo hub country model also focuses on children. While there is a positive correlation between maternal mortality rate and average income across the world, not every country that achieved economic growth also reduced mortality rates: WEGo member states like Finland had a maternal mortality rate of 8.3 with a GDP of $47,371 while the United States (non-WEGO) had a maternity mortality rate of 21.1 with a GDP of $60,159 (Roser & Ritchie, 2024). Similarly, according to Emily Oster, an economist at Brown University, the infant mortality rate in the US is comparably higher than Finland, but "the difference is well-off women in Finland and less-educated women in Finland have very similar infant mortality profiles. Whereas that is not true in the US (Cassin, 2017)”. In fact, the United States has the highest infant and maternal mortality rates out of all OECD countries even though it spends the most on health care (Petrullo, 2023). The Finnish social insurance company KELA has distributed the baby box since 1937, gradually developing what initially started as a program for socially needy women to all expectant mothers (Neuezeit.At, 2022) - accompanied by national prenatal care and education for parents (Cassin, 2017). 87 years later, Finland has one of the lowest mortality rates for both women and infants globally.
From the Extreme Gradient Boosting model, different SDG indicators show more strongly associated relationships with subjective well-being scores based on whether the data is from a WEGo member state, WEGo hub in OECD, or no association with WEGo in OECD countries.