资源环境科技发展态势分析平台

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Income inequality is one aspect of economics that resonates with many Americans: It feels like the rich are getting richer, while so many others have a hard time just getting by. But what if income growth had stayed as equitable as it was in the three decades after World War II?

RAND experts answered this question by using a new method to quantify the scale of the U.S. income gap. Here are their key findings:

• Starting around 1975, incomes of the bottom 90 percent of Americans grew more slowly than the economy as a whole, while incomes of the top 10 percent grew faster.
• If all Americans' earnings had instead kept pace with GDP growth from 1975 to 2018, then the cumulative income of the bottom 90 percent of U.S. adults would have been $47 trillion higher by 2018.
• In 2018 alone, the bottom 90 percent would have earned $2.5 trillion more—a 67 percent increase.

The authors of the study were surprised by the sheer magnitude of this inequity. “There is no way of slicing the numbers where people come out ahead,” said RAND mathematician Carter Price.

— Deanna Lee

Teachers work outside of their school building as they prepare for the delayed start of the school year, Brooklyn, New York, September 14, 2020

Photo by Brendan McDermid/Reuters

This spring, schools across America had to rapidly shift to remote learning. Nine months later, most are still either providing entirely online instruction or using a hybrid model.

To learn more about this unprecedented period, RAND conducted nationally representative surveys of teachers and principals.

When schools shut down in April and May, nearly all teachers reported that they were providing distance learning. However, most said that they couldn't cover the full curriculum. Challenges persisted in the fall: Teachers reported having trouble contacting all of their students.

As a result of these challenges, morale is low. About 80 percent of teachers said that they feel burnt out, and one-quarter said that they were likely to leave the profession altogether.

Of course, the shift to distance learning is having a tremendous effect on students, too. And importantly, the negative consequences affect some groups more than others; high-poverty schools and schools that serve high percentages of students of color have been especially hard hit. For example, principals in the highest-poverty schools reported that, on average, only 80 percent of students had adequate internet access. The pandemic has likely made existing disparities in educational opportunities and outcomes even worse.

As the pandemic rages on, these findings highlight the urgent need to focus on making schools safer to attend in person.

— D.L.

Image by Chara Williams/RAND Corporation

The goal of RAND's Gun Policy in America initiative is to provide policymakers and the public with objective, factual information on the effects of gun laws. In 2020, the initiative launched several new resources.

RAND researchers took a close look at household firearm ownership by state. They developed a longitudinal database of state-level estimates of gun ownership from 1980 to 2016. Knowing how many Americans own guns, and how that number varies over time and across the country, is important for understanding how laws affect gun ownership and outcomes such as suicides, homicides, and mass shootings.

We also expanded our database of state firearm laws, which now includes required reporting of lost and stolen guns, as well as firearm removal at the scene of domestic violence incidents.

We launched a new resource for teachers who are interested in helping high school students discuss and understand gun policy research.

Finally, a RAND study found that implementing the most restrictive combination of three common policies—child-access-prevention laws, right-to-carry laws, and stand-your-ground laws—is associated with a reduction in firearm-related deaths over time. This data visualization breaks down the findings, showing how regulations on the ways that guns are stored, carried, and used could save lives.

— April Stock

Design by Rick Penn-Kraus/RAND Corporation

Tabletop games that focus on the military typically explore how one armed force might match up against another. But they usually don't account for the bigger picture.

That's why our experts created “Hedgemony,” a new kind of strategic game—and the first RAND has offered to the public.

In Hedgemony, players represent either the United States and its allies, or its key adversaries. Every game begins with a specific scenario, with players then developing “hedging” strategies and trying to execute their plans.

During a turn (each of which represents about one year), players must make tough choices about how to use their resources. For example, they might have to decide whether to procure new forces, modernize existing forces, or improve a specific capability.

Players can choose to cooperate—or not. The ultimate goal is to gain more global influence than their competitors.

— D.L.

Photo by the RAND Corporation

Understanding patterns of COVID-19 spread can help policymakers estimate the effects of travel-related interventions, such as restricting air travel from various countries.

RAND researchers created a new tool that combines COVID-19 case data with detailed air travel data to visualize how infections and commercial air travel have interacted to export coronavirus risk across the world.

Here are a few key findings:

• By late January 2020, one or two passengers infected with COVID-19 were likely flying from China to international destinations via commercial air travel each day.
• Around that same time, the number of cases in China was likely 37 times higher than Beijing reported.
• A dramatic increase in the worldwide spread of COVID-19 began on February 19, 2020—exactly three weeks before the official declaration of a global pandemic.

— Gabby Peterson

Image design by Katherine Wu/RAND Corporation; photos by Dmytro (PRC flag with yuan) and Mike (Chinese soldiers)/Adobe Stock

Tensions between the United States and China continued to rise throughout 2020. How will the relationship between the world's two most powerful countries change in the coming decades? And will Beijing reach its ambitious goals?

To explore these questions, a team of RAND experts mapped out four possible scenarios for China in 2050: triumphant, ascendant, stagnant, and imploding.

The researchers rated two of these scenarios as the most plausible. An “ascendant China” would largely succeed at achieving its long-term goals. Alternatively, a “stagnant China” would confront major challenges and be mostly unsuccessful at implementing Beijing's grand strategy.

However, the kind of country China becomes is neither preordained nor completely beyond America's influence. The United States should prepare for a China whose role on the global stage grows steadily.

— G.P.

Turkish President Recep Tayyip Erdoğan speaks during a ceremony marking the second anniversary of the attempted coup at the presidential palace in Ankara, July 15, 2018

Photo by Umit Bektas/Reuters

The United States has relied on a strategic partnership with Turkey for more than 60 years. The two nations have cooperated on countering terrorism and violent extremism, preventing the proliferation of weapons of mass destruction, enhancing energy security, and promoting prosperity and development.

But this partnership has become strained in recent years; Ankara's and Washington's interests are not as aligned as they once were.

In Turkey, anti-American sentiment has increased, along with doubts about the reliability of the U.S. commitment to Turkish security. And in the United States, concerns are growing over the authoritarian drift under President Recep Tayyip Erdoğan and tensions between Turkey and its neighbors.

RAND researchers assessed the key challenges confronting the U.S.-Turkish relationship over the coming decade and recommended potential ways to sustain it, such as diplomatically defusing differences over Syria and continuing U.S. and NATO military engagements with Turkey to counterbalance Russian influence.

— A.S.

A Delta IV rocket successfully launches the Global Positioning System IIF-5 satellite from Space Launch Complex-37 at Cape Canaveral Air Force Station, Florida, February 20, 2014

Photo by Ben Cooper/United Launch Alliance

Why and where will the next war occur? Who will the United States fight alongside and against? And how will future conflicts be fought?

RAND experts sought to answer these questions in a series of reports. The researchers took a holistic approach, exploring the geopolitical, economic, military, environmental, legal, and informational trends that will shape conflict through 2030.

The authors find that the United States will confront a series of strategic dilemmas. Future warfare will place more demands on U.S. forces and pull limited resources in opposite directions. America could break with the past and become more selective about committing its forces. Or it could double down on its commitments, knowing that doing so may come with higher costs.

— A.S.

Russian President Vladimir Putin takes part in a video conference call at the Novo-Ogaryovo state residence outside Moscow, May 18, 2020

Photo by Alexei Nikolsky/Reuters

Ahead of the 2020 U.S. election season, a series of RAND reports helped policymakers and the public understand online foreign interference in national, state, and local elections—and how to mitigate this threat.

Overall, Russian interference in U.S. elections focuses on creating distrust, with the goal of paralyzing the American political process. This type of interference isn't new. Moscow's recent election meddling is based largely on strategies developed by the Soviet Union during the Cold War. However, new technology and the rise of social media have made it easier for Russia to implement its propaganda campaigns.

Such a campaign was likely underway in early 2020. After examining 2.2 million tweets, RAND experts found convincing evidence of a coordinated effort, likely foreign, to influence the U.S. presidential election. Activity by two types of Twitter accounts—“trolls” and “superconnectors”—may have worked in favor of President Trump, and against President-elect Biden.

But do attempts to influence Americans via social media actually work in the first place? A randomized controlled trial of more than 1,500 Facebook users helped RAND researchers understand how Americans react emotionally to Russian propaganda. They found that Moscow's political memes are particularly effective at generating strong reactions along partisan lines. This increased the chances that study participants reported “liking” or sharing the Russian content. But there's good news: People may spread foreign propaganda less often when they know where it comes from.

— G.P.

Shoppers line up to enter a Home Depot store as they practice social distancing to help slow the spread of COVID-19 in St. Louis, Missouri, April 4, 2020

Photo by Lawrence Bryant/Reuters

The most popular RAND research of 2020 launched in early May.

“Quarantine,” “social distancing,” and “flatten the curve” still felt like new additions to everyday speech. Parents hoped that their kids could return to in-person school in the fall. And after weeks of widespread shutdowns in March and April, state and local officials were weighing the potential effects of relaxing or tightening various disease-fighting measures.

In an effort to support evidence-based decisions, RAND researchers developed an interactive tool that was among the first to combine epidemiological and economic models. The tool estimated the effects on new cases, fatalities, unemployment claims, and more.

We've all lived through what's happened since. But one of the researchers' conclusions is especially resonant today: It's rarely helpful to think of these difficult policy decisions as a zero-sum game between public health and the economy. The two crises are, in so many ways, the same crisis.

According to RAND economist Aaron Strong, the situation is more like a classic prisoner's dilemma. Individuals are tempted to engage in risky behavior, potentially at great cost to their communities.

“We can either open up completely and have significant consequences,“ Strong said, ”or we can cooperate and create an outcome that may be costly in the short run. But we'll have a healthier population and a healthier economy in the long run.”

— P.W.