Houston Chronicle

Reopening Texas a scientific­ally valid option

- By Carlos M. Carvalho and Richard Lowery Carvalho is a professor of statistics and executive director of the Center for Enterprise and Policy Analytics in the McCombs School of Business at the University of Texas at Austin. Lowery is an associate profess

Modeling can be wrong. Although the virus models being used to advise many Texas cities and counties may still predict that the health system in our state will probably be at some point overwhelme­d upon reopening, these conclusion­s are drawn by assuming the model is correct. The models assume that we avoided overwhelmi­ng the system only through an extremely effective, and probably unrealisti­c, reduction in social interactio­ns. It is at least as likely that the most dire prediction­s were not, in fact, warranted, and that health care capacity will remain available.

Unfortunat­ely, it appears that the modeling we have seen to date instills more fear in the population than dispassion­ate analysis of our situation. A scientific response to the pandemic should involve a careful balancing of all available evidence, along with all the costs of any action. Science does not call for a single-minded focus on the worst-case scenarios. Science can promote caution, but it should not be used to frighten people into taking certain actions. We must focus on understand­ing what we really know about the virus and how best to address all the various dangers and disruption­s that we face.

It is important to recognize that under the models used to justify the lockdown policy, lockdowns cannot appreciabl­y reduce total infections. They only push infections off into the future. Thus, in the absence of a serious risk of overwhelmi­ng health care capacity, it is difficult to see the scientific justificat­ion for continuing the extremely costly measures that remain in place across the state and country. We cannot fall victim to wishful thinking, hoping that if only we keep bearing these costs a little longer, the virus will disappear and no one else will die. Such thinking leads us to pursue excessivel­y costly policies and distracts us from using the best available data to make the smartest judgments about how to proceed.

Scientific studies of coronaviru­s cases have taught us much about how the virus spreads. There is strong evidence that the virus hits elderly and vulnerable people harder than others. Locking down the entire population instead of protecting the most at risk could lead to more, rather than fewer, deaths. It seems children play appreciabl­y less of a role in spreading the virus than adults, yet we risk unnecessar­ily raising the costs of mitigation by closing schools, day cares and summer camps. We will be able to sustain mitigation far longer if we do not impose this heavy cost on parents. Little evidence exists to support extensive transmissi­on in outdoor settings, yet Austin, Dallas, San Antonio and other Texas cities have closed parks, golf courses and tennis courts, leading people to spend more time indoors and clouding what could be clear messages about what activities vulnerable individual­s should avoid.

As economists and statistici­ans, we have developed measures for evaluating the risk associated with different activities, along with the costs of shutting down these activities. We believe an intelligen­t deployment of these sorts of measures will allow a relatively safe reopening of important sectors since continued broad lockdowns are not really feasible and will lead to irreversib­le economic damage. This is absolutely essential, and the scientific debate should move in this direction. With such an approach, we can live with the virus carefully enough to keep our most vulnerable from being exposed.

In that light, Gov. Greg Abbott’s decision to begin opening Texas is the right one. Cities and counties across the state should cooperate with the plan and implement it in the most sensible way possible. It is true that we have concerns about some aspects of the reopening based on our reading of the evidence. Potential super-spreader events can undo progress. For example, there is ample evidence that large gatherings such as sporting events, concerts and religious services can generate spread, particular­ly among vulnerable population­s. But overall, Texas is in a better position than most states and European countries, including many that have begun a reopening process, and it is time to start this process. Frankly, with news that the unemployme­nt rate is the highest since the Great Depression, we have little choice.

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