Status quo bias is an emotional bias; a preference for the current state of affairs. The current baseline (or status quo) is taken as a reference point, and any change from that baseline is perceived as a loss. Status quo bias should be distinguished from a rational preference for the status quo ante, as when the current state of affairs is objectively superior to the available alternatives, or when imperfect information is a significant problem. A large body of evidence, however, shows that status quo bias frequently affects human decision-making.
Status quo bias should also be distinguished from psychological inertia, which refers to a lack of intervention in the current course of affairs. For example, consider a pristine lake where an industrial firm is planning to dump toxic chemicals. Status quo bias would involve avoiding change, and therefore intervening to prevent the firm from dumping toxic chemicals in the lake. Conversely, inertia would involve not intervening in the course of events that will change the lake.
The bias intersects with other non-rational cognitive processes such as loss aversion, existence bias, endowment effect, longevity, mere exposure, and regret avoidance. Experimental evidence for the detection of status quo bias is seen through the use of the reversal test. A vast amount of experimental and field examples exist. Behaviour in regard to retirement plans, health, and ethical choices show evidence of the status quo bias.
Kahneman, Thaler, and Knetsch created experiments that could produce this effect reliably. Samuelson and Zeckhauser (1988) demonstrated status quo bias using a questionnaire in which subjects faced a series of decision problems, which were alternately framed to be with and without a pre-existing status quo position. Subjects tended to remain with the status quo when such a position was offered to them.
Hypothetical choice tasks: Subjects were given a hypothetical choice task in the following "neutral" version, in which no status quo was defined: "You are a serious reader of the financial pages but until recently you have had few funds to invest. That is when you inherited a large sum of money from your great-uncle. You are considering different portfolios. Your choices are to invest in: a moderate-risk company, a high-risk company, treasury bills, municipal bonds." Other subjects were presented with the same problem but with one of the options designated as the status quo. In this case, the opening passage continued: "A significant portion of this portfolio is invested in a moderate risk company ... (The tax and broker commission consequences of any changes are insignificant.)" The result was that an alternative became much more popular when it was designated as the status quo.
Electric power consumers: California electric power consumers were asked about their preferences regarding trade-offs between service reliability and rates. The respondents fell into two groups, one with much more reliable service than the other. Each group was asked to state a preference among six combinations of reliability and rates, with one of the combinations designated as the status quo. A strong bias to the status quo was observed. Of those in the high-reliability group, 60.2 percent chose the status quo, whereas a mere 5.7 percent chose the low-reliability option that the other group had been experiencing, despite its lower rates. Similarly, of those in the low reliability group, 58.3 chose their low-reliability status quo, and only 5.8 chose the high-reliability option.
Automotive insurance consumers and other examples: The US states of New Jersey and Pennsylvania inadvertently ran a real-life experiment providing evidence of status quo bias in the early 1990s. As part of tort law reform programs, citizens were offered two options for their automotive insurance: an expensive option giving them full right to sue and a less expensive option with restricted rights to sue. In New Jersey the cheaper option was the default and most citizens selected it. Only a minority chose the cheaper option in Pennsylvania, where the more expensive option was the default.
Status quo bias has been attributed to a combination of loss aversion and the endowment effect, two ideas relevant to prospect theory. An individual weighs the potential losses of switching from the status quo more heavily than the potential gains; this is due to the prospect theory value function being steeper in the loss domain. As a result, the individual will prefer not to switch at all. In other words, we tend to oppose change unless the benefits outweigh the risks. However, the status quo bias is maintained even in the absence of gain/loss framing: for example, when subjects were asked to choose the colour of their new car, they tended towards one colour arbitrarily framed as the status quo. Loss aversion, therefore, cannot wholly explain the status quo bias, with other potential causes including regret avoidance, transaction costs and psychological commitment.
Rational routes to status quo maintenanceEdit
A status quo bias can also be a rational route if there are cognitive or informational limitations.
- Informational limitations
Decision outcomes are rarely certain, nor is the utility they may bring. Because some errors are more costly than others (Haselton & Nettle, 2006), sticking with what worked in the past is a safe option, as long as previous decisions are "good enough".
- Cognitive limitations
Choice is often difficult, and decision makers may prefer to do nothing and/or to maintain their current course of action because it is easier. Status quo alternatives often require less mental effort to maintain.
The irrational maintenance of the status quo bias links and confounds many cognitive biases.
- Existence bias
An assumption of longevity and goodness are part of the status quo bias. People treat existence as a prima facie case for goodness, aesthetic and longevity increases this preference. The status quo bias affects people's preferences; people report preferences for what they are likely rather than unlikely to receive. People simply assume, with little reason or deliberation, the goodness of existing states.
Longevity is a corollary of the existence bias: if existence is good, longer existence should be better. This thinking resembles quasi-evolutionary notions of "survival of the fittest", and also the augmentation principle in attribution theory.
Psychological Inertia is another reason used to explain a bias towards the status quo. Another explanation is fear of regret in making a wrong decision, i.e. If we choose a partner, when we think there could be someone better out there.[better source needed]
Mere exposure is an explanation for the status quo bias. Existing states are encountered more frequently than non-existent states and because of this they will be perceived as more true and evaluated more preferably. One way to increase liking for something is repeated exposure over time.
- Loss aversion
Loss aversion also leads to greater regret for action than for inaction; more regret is experienced when a decision changes the status quo than when it maintains it. Together these forces provide an advantage for the status quo; people are motivated to do nothing or to maintain current or previous decisions. Change is avoided, and decision makers stick with what has been done in the past.
Changes from the status quo will typically involve both gains and losses, with the change having good overall consequences if the gains outweigh these losses. A tendency to overemphasize the avoidance of losses will thus favour retaining the status quo, resulting in a status quo bias. Even though choosing the status quo may entail forfeiting certain positive consequences, when these are represented as forfeited "gains" they are psychologically given less weight than the "losses" that would be incurred if the status quo were changed.
The loss aversion explanation for the status quo bias has been challenged by David Gal and Derek Rucker who argue that evidence for loss aversion (i.e., a tendency to avoid losses more than to pursue gains) is confounded with a tendency towards inertia (a tendency to avoid intervention more than to intervene in the course of affairs). Inertia, in this sense, is related to omission bias, except it need not be a bias but might be perfectly rational behavior stemming from transaction costs or lack of incentive to intervene due to fuzzy preferences.
- Omission bias
Omission bias may account for some of the findings previously ascribed to status quo bias. Omission bias is diagnosed when a decision maker prefers a harmful outcome that results from an omission to a less harmful outcome that results from an action.
The reversal test: when a proposal to change a certain parameter is thought to have bad overall consequences, consider a change to the same parameter in the opposite direction. If this is also thought to have bad overall consequences, then the onus is on those who reach these conclusions to explain why our position cannot be improved through changes to this parameter. If they are unable to do so, then we have reason to suspect that they suffer from status quo bias. The rationale of the reversal test is: if a continuous parameter admits of a wide range of possible values, only a tiny subset of which can be local optima, then it is prima facie implausible that the actual value of that parameter should just happen to be at one of these rare local optima.
A study found that erroneous status quo rejections have a greater neural impact than erroneous status quo acceptances. This asymmetry in the genesis of regret might drive the status quo bias on subsequent decisions.
A study was done using a visual detection task in which subjects tended to favour the default when making difficult, but not easy, decisions. This bias was suboptimal in that more errors were made when the default was accepted. A selective increase in sub-thalamic nucleus (STN) activity was found when the status quo was rejected in the face of heightened decision difficulty. Analysis of effective connectivity showed that inferior frontal cortex, a region more active for difficult decisions, exerted an enhanced modulatory influence on the STN during switches away from the status quo.
Research by University College London scientists that examines the neural pathways involved in 'status quo bias' in the human brain and found that the more difficult the decision we face, the more likely we are not to act. The study, published in Proceedings of the National Academy of Sciences (PNAS), looked at the decision-making of participants taking part in a tennis 'line judgement' game while their brains were scanned using functional MRI (fMRI). The 16 study participants were asked to look at a cross between two tramlines on a screen while holding down a 'default' key. They then saw a ball land in the court and had to make a decision as to whether it was in or out. On each trial, the computer signalled which was the current default option – 'in' or 'out'. The participants continued to hold down the key to accept the default and had to release it and change to another key to reject the default. The results showed a consistent bias towards the default, which led to errors. As the task became more difficult, the bias became even more pronounced. The fMRI scans showed that a region of the brain known as the sub-thalamic nucleus (STN) was more active in the cases when the default was rejected. Also, greater flow of information was seen from a separate region sensitive to difficulty (the prefrontal cortex) to the STN. This indicates that the STN plays a key role in overcoming status quo bias when the decision is difficult.
Behavioral economics and the default positionEdit
Against this background, two behavioral economists devised an opt-out plan to help employees of a particular company build their retirement savings. In an opt-out plan, the employees are automatically enrolled unless they explicitly ask to be excluded. They found evidence for status quo bias and other associated effects. The impact of defaults on decision making due to status quo bias is not purely due to subconscious bias, as it has been found that even when disclosing the intent of the default to consumers, the effect of the default is not reduced.
Status-quo educational bias can be both a barrier to political progress and a threat to the state's legitimacy and argue that the values of stability, compliance, and patriotism underpin important reasons for status quo bias that appeal not to the substantive merits of existing institutions but merely to the fact that those institutions are the status quo.
The status quo bias is seen in important real life decisions; it has been found to be prominent in data on selections of health care plans and retirement programs.
There is a belief that preference for the status quo represents a core component of conservative ideology in societies where government power is limited and laws restricting actions of individuals exist. Conversely, in socialist and liberal societies, movements to impose restrictions on individuals or governments are met with widespread opposition by those that favor the status quo. Regardless of the type of society, the bias tends to hinder progressive movements in the absence of a reaction or backlash against the powers that be.
Status quo bias may be responsible for much of the opposition to human enhancement in general and to genetic cognitive enhancement in particular. Some ethicists argue, however, that status quo bias may not be irrational in such cases. The rationality of status quo bias is also an important question in the ethics of disability.
Education can (sometimes unintentionally) encourage children’s belief in the substantive merits of a particular existing law or political institution, where the effect does not derive from an improvement in their ability or critical thinking about that law or institution. However, this biasing effect is not automatically illegitimate or counterproductive: a balance between social inculcation and openness needs to be maintained.
Given that educational curriculums are developed by Governments and delivered by individuals with their own political thoughts and feelings, the content delivered may be inadvertently affected by bias. When Governments implement certain policies, they become the status quo and are then presented as such to children in the education system. Whether through intentional or unintentional means, when learning about a topic, educators may favour the status quo. They may simply not know the full extent of the arguments against the status quo or may not be able to present an unbiased account of each side because of their personal biases. 
An experiment to determine if a status-quo bias, toward current medication even when better alternatives are offered—, exists in a stated-choice study among asthma patients who take prescription combination maintenance medications. The results of this study indicate that the status quo bias may exist in stated-choice studies, especially with medications that patients must take daily such as asthma maintenance medications. Stated-choice practitioners should include a current medication in choice surveys to control for this bias.
An example of the status quo bias affecting retirement plans is a study done that examined the U.S. equity mutual fund. They found that people maintained the plan they had previously, even if it was no longer the optimal choice. Another study in 1986 examined the effect of status quo bias on those planning their retirement savings when given the yearly choice between two investment funds. Participants were able to choose how to proportionally split their retirement savings between the two funds at the beginning of each year. After each year, they were able to amend their chose split without switching costs as their preferences changed. Even though the two funds had vastly different returns in both absolute and relative terms, the majority of participants never switched the preferences across the trial period. Status quo bias was also more evident in older participants as they preferred to stay with their original investment, rather than switching as new information came to light. 
Korobkin’s has studied a link between negotiation and status quo bias in 1998. In this studies shows that in negotiating contracts favor inaction that exist in situations in which a legal standard and defaults from contracts will administer absent action. This involves a biased opinion opposed to alternative solutions. Heifetz’s and Segev’s study in 2004 found support for existence of a toughness bias. It is like so-called endowment effect which affects seller’s behavior.
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