The Chinese proverb “Women hold up half the sky” asserts that women are a resource and should be positioned outside of the home in the professional field. In fact, women are claimed to have held up 41% of China’s GDP in 2016, which is the largest share in the Asia-Pacific, and it is believed that they will make an even greater contribution if female representation in the workplace increases.¹ However, what will happen to unpaid household production if women’s paid work increases? Some may consider outsourcing their domestic responsibility to the market, provided that there are supportive public policies when the cost is high. Voters are therefore likely to cast their votes for certain types of candidates they believe will stand for them. In the literature, female politicians are shown to prioritize soft issues to a greater extent than male politicians (e.g., Koch, 2000). Thus, this paper aims to investigate the influence of a rising female labor force participation rate on the vote share of women in the context of Taiwan, while taking the importation of foreign domestic workers into account.

The opportunity cost of market work is the value of the reduced time available for household work. Domestic duties need not be performed by the woman herself, since there are professional workers available to do this. Low-skilled female migrant workers who enter domestic service fill sectors of the economy not favored by locals at lower prices than would be charged by native workers or companies, especially when the expansion of the service sector raises women’s relative wages and their time allocation in labor market (Ngai & Petrongolo, 2017). As these temporary domestic helpers act as a substitute for the time spent in household production, they potentially influence the labor supply, a topic that has been investigated by a rich strand of the literature based on data within individual countries (e.g., Barone & Mocetti, 2011; Cortés & Pan, 2013; Cortés & Tessada, 2011; Del Carpio, Ozden, Testaverde, & Wagner, 2015; Farré, González, & Ortega, 2011).

Even though foreign sources of labor allow highly skilled native workers to contribute to the economy, Taiwan is relatively conservative when it comes to tackling the issue of foreign workers. The official foreign worker scheme in Taiwan began in 1992 with the government’s policy being presented as a solution to the growing demands for housekeeping and caring services following the expansion in the number of nuclear households and an aging society in contemporary Taiwan (Lan, 2003). According to the program, foreign domestic workers could initially only be employed to take care of the severely ill or disabled but were subsequently allowed to care for children under the age of 12 or for elderly family members over the age of 70 with a limited number of quotas. In recent years, the program has been scaled down even further and only permits special applications for foreign investors and families requiring specialized child or elderly care (Cortés & Pan, 2013). In the first quarter in 2018, only about 250,000 foreigners were legally employed as domestic helpers or caretakers, accounting for 2.1 percentage points of the labor force in Taiwan. Moreover, 99.3% of these workers were female.

To bring influence to bear on government policies, citizens in a democratic economy may consider pursuing their objectives through elections. Migrant female domestic workers provide native women with the opportunity to participate in the labor market and to devote their spare time to the public sphere. Since the time is constrained and leisure is normally good, it is therefore reasonable to predict that women have preferred positions in regard to public affairs, and consequently make choices based on these preferences. Lewis and Bierly (1990) demonstrate that female voters have different voting rules from males, in that they are more likely to exhibit pro-female sentiment in evaluating female candidates. One possible reason is that they understand women as a group and represent the interests of women.

Other scholars argue that many voters have a predisposition to support female as opposed to male candidates, or vice versa. This baseline gender preference can be explained by the voter’s gender and by gender stereotypes about traits, beliefs, and issue competency, which can affect the vote decision (Inglehart & Norris, 2000; Sanbonmatsu, 2002). For example, voters perceive male candidates to be better at handling economic and foreign affairs and female candidates to be better at helping disadvantaged minorities and protecting women’s rights, and there is empirical evidence of a gender gap in policy preferences among politicians (e.g., Beaman, Duflo, Pande, & Topalova, 2012; Bhalotra & Clots-Figueras, 2014; Brollo & Troiano, 2016; Chen, 2013; Clots-Figueras, 2012; Pande, 2003).

There has been extensive research into the rise in female labor market participation, and similar extensive research into the rise in women’s share of the vote, but there has been relatively little study of the interplay between the two phenomena. Given the evidence that female politicians represent the interests of women to a greater extent than male politicians, and that there may be gender preferences in voting decisions, this paper attempts to investigate the effect of female labor force participation on the share of the vote of female candidates. In addition, in order to address the problem of endogeneity, the number of foreign domestic workers is regarded in this study as playing an instrumental role in the female labor force participation rate, because immigration policies are seldom discussed during elections in Taiwan and hence are unlikely to have a direct effect on the female candidates’ share of the vote. The results show that the number of votes for female candidates is a response to the female labor supply, which is likely to reflect voters’ demands for public policies to expand the importation of foreign domestic workers.

The situation whereby women are the persons in charge of taking care of the family remains the same even as non-marriage has become a trend and the social status of women has made great progress in recent decades. According to the Survey on Social Development Trend in 2014 conducted by National Statistics in Taiwan, women spend twice the amount of time each day on domestic affairs than do men, especially in the cases of married and cohabiting women. In addition, longer working hours are required if there is a need for family care. Even if men’s share of the housework has increased, most of the burden has continued to fall on the women.

Nevertheless, stagnating monthly salaries accompanied by rising price levels since the mid-1990s have also served to encourage more women to go out and work in Taiwan. The 2013 Women’s Marriage, Fertility, and Employment Survey conducted by the Directorate-General of Budget, Accounting, and Statistics (DGBAS) showed that 55.9% of married women in the labor force are currently employed. This ratio is 8.07 percentage points higher than that in 1990. Participation in the labor market has turned out to be an inevitable tendency for women as they compare the costs and benefits of being a fulltime housewife. However, who will fill the traditional role of women in the family?

Cortés and Tessada (2011) build a model describing the relationship between labor force participation and the provision of household services. The model asserts that a larger burden of household services decreases not only leisure and/or labor supply, but also lowers the marginal productivity of time devoted to household work since the cost of time increases as women spend more time doing household work. Therefore, women might start to purchase services when there is a sufficiently large amount of household work. One possible way for them to outsource a significant portion of their domestic responsibility to the market is thus to join the labor market to cover part of the cost of the additional market services.

Even if there is an increasing demand for domestic helpers and caretakers, who are known as domestic workers, hiring a native person is expensive in Taiwan since the salary is around 1,600–2,000 USD (or 50,000–60,000 NTD) per month for 12 working hours per day. However, employing a foreigner as a domestic worker only costs 566 USD (or 17,000 NTD) per month for 15 working hours per day. The relatively low cost of foreign domestic workers may therefore be preferred and explains the positive correlation between female labor supply and the number of foreign domestic workers in Taiwan, as shown in Figure 1.

Figure 1. 
The correlation between foreign domestic workers and female labor supply.

In Taiwan, the trend toward an increasingly elderly population has accelerated. Even though there are increasing demands for the Taiwanese government to relax the limits on hiring domestic workers to care for those aged 80 and above, it has remained relatively passive when it comes to raising the import quotas for foreign domestic workers out of concern that this may jeopardize the employment opportunities of Taiwan’s citizens. In fact, it is argued that varying political institutions, divergent national histories of settlement and colonialism, and the different effects of a changing international context have resulted in systematic differences in immigrant policies among countries (Bauer, Lofstrom, & Zimmermann, 2001; Freeman, 1995; Scheve & Slaughter, 2001). The character of immigration politics may also change over time within a country in the context of partisan electoral competition. Nevertheless, immigration policies are seldom discussed during elections in Taiwan, even by interest groups that have advocated legal reforms. Cheng Chang, the founder of Brilliant Time: Southeast Asia-Themed Bookstore, has claimed in the BBC’s report “Silent Millions: Immigration Policy in Taiwan’s General Election” that immigration policy is an essential but not urgent issue, compared to others like economic affairs and cross-Strait relations, and thus it is not usually assigned a high level of priority.² Specifically, such market demands have only found their way to the campaign platform of the Taiwan National Congress (TNC), a small political party inclined to the right, in the 2012 legislative elections. However, the TNC did not win any seats in parliament in the end. This may reflect the fact that the electorate usually only pays attention to major political issues or candidates’ personal morals during the campaign, instead of considering policies such as bringing in foreign domestic workers, especially when native workers’ wages are not impacted by immigrants under the strict importation policy.³ Thus, it has been suggested that such policies are not determined by the electorate ex ante, but are formulated after the election takes place.

Ideally, for more women to enter the labor market, it may be necessary to first solve the demand-side problem regarding housework services, and acquiring public support through elections seems to be a good way of resolving this issue in a democratic economy. Therefore, it would be interesting to examine whether an increase in female labor supply influences vote choice by taking the importation of foreign domestic workers into account.

Figures 2 and 3 scatter the relationship between the female labor force participation rate and electoral outcomes for women, with the solid line indicating the fitted values with all of the controls. It provides evidence showing that a higher female labor force participation rate is associated with more votes going to female candidates and a higher female vote share. Since female labor supply is also positively correlated with total votes in Figure 4, the previous findings may reveal the progress of democratization, but not an increasing demand for public policies concerning women. Therefore, a more sophisticated investigation, which takes the endogeneity problem into account, is required.

Figure 2. 
The correlation between female labor supply and votes for female candidates.

Figure 3. 
The correlation between female labor supply and the vote share of female candidates.

Figure 4. 
The correlation between female labor supply and total votes.

Given that foreign domestic workers provide women with an opportunity to replace their traditional role in the family at a lower cost, and their availability is less likely to be determined by the electorate ex ante, they appear to serve as a good candidate for an instrument for female labor supply. The estimation of equation (2), which examines the validity of foreign domestic workers, is reported in Table 1. The results from regressions in columns (1), (4), and (7) show that foreign domestic workers are positively correlated to female labor force participation. Moreover, there seems to be an income effect for women in relation to the choice of entering the labor market.⁷ Nevertheless, the income effect vanishes when other controls are included in columns (2), (5), and (8), while the relationship between foreign domestic workers and female labor force participation remains.

The estimation of equation (2) with year dummies is given in columns (3), (6), and (9).⁸ Generally, foreign domestic workers significantly explain female labor supply in that a one percentage point increase in the number of foreign domestic workers leads to a 1.539–1.556 percentage point rise in the female labor force participation rate, depending on whether year dummies are controlled for. The effect is larger in local elections, as shown in column (9), which may reflect the fact that local governments address soft policies related to individuals with a more pragmatic attitude than does the central government. Even though it is argued that women are likely to leave their jobs temporarily to take care of young children, they are also likely to go back to the job market when living costs are high and there is support for their household chores. This argument appears to be reasonable since an increase in the population under 15 years old is positively correlated with the female labor force participation rate.⁹

The estimation of equation (1), using foreign domestic workers as an instrument for female labor supply, is reported in Table 2. This study considers three different measures to represent electoral outcomes: the female vote share, votes for female candidates, and total votes. The results show that a higher female labor force participation rate is relevant for female candidates’ votes and total votes when both types of elections are considered, which are shown in columns (2) and (3), respectively. Moreover, the effect on votes for female candidates is larger than that on total votes, which may indicate the female electorate’s higher demand for women-related policies. Nevertheless, the scale of the increase in the votes for female candidates is not large enough to make a statistically significant increase in the female candidates’ share of the vote. This may partly reflect the current political situation in Taiwan whereby political parties continue to play a crucial role in determining the electoral outcomes by nominating certain types of candidates with the purpose of maximizing seat share. Even though female candidates are also considered during the nomination process, a relatively small number of female candidates are shown on the ballot.¹⁰ Therefore, there appears to be an upper limit for the share of female candidates’ votes even if they have already accounted for more than 25% of the seats in the local councils and national legislature.

However, the effect of foreign domestic workers may not be strong enough as the instrument for female labor force participation since the first-stage F value is below the often-used threshold of 10. As a result, conventional methods for inference can be misleading as standard estimators can be severely biased. Therefore, this study corrects the size of standard errors using the method proposed by Moreira (2003).¹¹ The conditional p-value shows that more women entering the labor market is very likely to result in more votes being gained by female candidates when the female electorate is concerned about household chore.

This study attempts to investigate the effect of a rising female labor force participation rate on female candidates’ vote share, while taking foreign domestic workers into account since foreign domestic workers are likely to serve as a substitute for the women’s traditional role in the family as caretakers or domestic helpers. The results show that more women entering the labor market results in more votes being gained by female candidates, which is likely to be caused by the supply of foreign domestic workers, but not by other types of workers, such as industrial foreign workers. Foreign domestic workers appear to be a valid instrument for female labor force participation because immigration policies are seldom discussed during elections in the context of Taiwan. Moreover, economic performance is not a channel from the instrument to the electoral outcomes for female candidates because the number of foreign domestic workers does not fluctuate with economic performance.

The findings in this study shed light on two issues: how the identity of politicians influences policies, and the policy preferences of female politicians. According to the median voter model, political decisions should only reflect the preferences of the median voters if candidates only care about winning the elections and will make whatever promises necessary to do so. However, the identity of politicians, such as gender, matters for policy determination if there is commitment problem. There is evidence that female politicians consider the duty of promoting the interests/views of women to be much more important than their male colleagues do and have more contacts with women’s organizations than male members (e.g., Wängnerud, 2005). This explains why the literature shows female politicians as usually giving priority to legislation dealing with women’s concerns about the family. As a result, female workers tend to identify with female candidates because they speak the same language.

Even though there are still drawbacks to this study, the results provide a possible explanation of the relationship between female workers and female candidates, a topic which could prove an interesting basis for future research.