After an IPO, zip codes close to a company's headquarters see certain home prices and consumer spending rise, while more new businesses and jobs are created. Photo via Pexels

A massive company announces plans to bring its headquarters to town, and the locals can't stop grumbling. The added traffic. The noise. The shifts in neighborhood routine as a giant new facility gets up and running.

Then the company files for an IPO.

Over the next two years, the traffic and dust may well be forgotten as residents watch their local economy transform. Anecdotal evidence suggests that the mere change in a company's listing status, along with the liquidity it brings its shareholders, can significantly influence local economies.

That was certainly the case with Facebook in 2012, when CEO Mark Zuckerberg helped create a thousand new millionaires and a dozen new billionaires. In the six months following Facebook's IPO, the newly rich drove up real estate prices in the San Francisco Bay area by more than 15 percent as their previously illiquid stock wealth became liquid. Two and a half decades earlier, Dell's 1988 IPO created "Dellionaires" who got rich off their shareholdings and promptly moved into McMansions in the Austin area, forever changing the city.

But were these spillover effects isolated incidents — or the norm? In a recent study, Rice Business professor Alexander W. Butler set out quantify the impact of spillover effects on local economies.

Collaborating with Larry Fauver of the University of Tennessee and Ioannis Spyridopoulos of American University, Butler found that Facebook's and Dell's impacts were not one-offs: IPOs typically spark significant positive spillovers in local economies. What's more, the team determined that it is the listing decision, rather than actual capital raising, that boosts local labor markets, business environments, consumer spending and real estate.

But why? An IPO doesn't create a new company. It does, however, generate significant liquidity for the firm, for employees and for other shareholders who go forth into the community to spend their new cash. Investors' wealth also rises if a firm's stock price climbs after listing, as does a firm's wealth as it raises new capital.

To be certain that it's not just a firm's raising of capital that causes these spillovers, Butler and his team also looked at the effects of seasoned equity offering (SEO) activity, which doesn't involve a change in a company's listing status. What they found is that the effect of SEOs on local economies is insignificant. So capital raising alone is not enough.

To reach their conclusions, Butler and his colleagues selected 1,365 zip codes that had at least one IPO between 1998 and 2015. (The years 1999, 2000 and 2003 were excluded due to a lack of income data at the zip code level.) They also identified zip codes that were two miles, five miles and ten miles from a newly public company's headquarters.

Then they compared their selected zip codes to control zip codes in the same county using a matching process to compare "apples to apples." The team compared figures such as changes in home prices, the number of new mortgages, zip code business patterns, credit card spending, and income and wages for the two years following an IPO.

Analyzing these data, they found that when an IPO occurs, each $10 million in proceeds leads to an extra 0.7 new businesses in the surrounding area and 41 new local jobs. And while the price of expensive homes in the newly public company's zip code didn't increase, the prices of expensive homes in other zip codes within two miles of headquarters did rise — by $3,900 for the average expensive home valued at $590,000.

Prices were also higher in zip codes two to five miles away from headquarters, but less so. Growth of home prices, they discovered, gets a boost after the lockup period ends and shareholders can sell their stock, supporting the hypothesis that changes in investor liquidity cause that spillover. Further evidence of this came when they found that home prices climb even more when a firm's stock price jumps after the IPO.

But IPOs are not all good news for communities. Findings also showed IPO activity increases the odds that middle- to lower-income residents may have to move to lower-income zip codes. In the years following Facebook's IPO, workers in the Bay area such as police officers, teachers and firefighters were priced out of the housing market and relegated to long commutes to work.

Facebook has taken notice. The Chan Zuckerberg Initiative, a charitable foundation Zuckerberg cofounded with his wife, Priscilla Chan, has donated $3.6 million toward the city's housing crisis.

As future companies go public, leaders could be well served to recognize Butler's team's findings. Yes, when their firm gains better access to financial markets, they're really are helping lift up the local economy — just not everyone who's living in it.

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This article originally ran on Rice Business Wisdom and is based on research from Alexander W. Butler, a professor of finance at Jones Graduate School of Business at Rice University.

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2 Houston space tech cos. celebrate major tech milestones

big wins

Two Houston aerospace companies — Intuitive Machines and Venus Aerospace — have reached testing milestones for equipment they’re developing.

Intuitive Machines recently completed the first round of “human in the loop” testing for its Moon RACER (Reusable Autonomous Crewed Exploration Rover) lunar terrain vehicle. The company conducted the test at NASA’s Johnson Space Center.

RACER is one of three lunar terrain vehicles being considered by NASA for the space agency’s Artemis initiative, which will send astronauts to the moon.

NASA says human-in-the-loop testing can reveal design flaws and technical problems, and can lead to cost-efficient improvements. In addition, it can elevate the design process from 2D to 3D modeling.

Intuitive Machines says the testing “proved invaluable.” NASA astronauts served as test subjects who provided feedback about the Moon RACER’s functionality.

The Moon RACER, featuring a rechargeable electric battery and a robotic arm, will be able to accommodate two astronauts and more than 880 pounds of cargo. It’s being designed to pull a trailer loaded with more than 1,760 pounds of cargo.

Another Houston company, Venus Aerospace, recently achieved ignition of its VDR2 rocket engine. The engine, being developed in tandem with Ohio-based Velontra — which aims to produce hypersonic planes — combines the functions of a rotating detonation rocket engine with those of a ramjet.

A rotating detonation rocket engine, which isn’t equipped with moving parts, rapidly burns fuel via a supersonic detonation wave, according to the Air Force Research Laboratory. In turn, the engine delivers high performance in a small volume, the lab says. This savings in volume can offer range, speed, and affordability benefits compared with ramjets, rockets, and gas turbines.

A ramjet is a type of “air breathing” jet engine that does not include a rotary engine, according to the SKYbrary electronic database. Instead, it uses the forward motion of the engine to compress incoming air.

A ramjet can’t function at zero airspeed, so it can’t power an aircraft during all phases of flight, according to SKYbrary. Therefore, it must be paired with another kind of propulsion, such as a rotating detonation rocket engine, to enable acceleration at a speed where the ramjet can produce thrust.

“With this successful test and ignition, Venus Aerospace has demonstrated the exceptional ability to start a [ramjet] at takeoff speed, which is revolutionary,” the company says.

Venus Aerospace plans further testing of its engine in 2025.

Venus Aerospace, recently achieved ignition of its VDR2 rocket engine. Photo courtesy of Venus Aerospace

METRO rolls out electric shuttles for downtown Houston commuters

on a roll

The innovative METRO microtransit program will be expanding to the downtown area, the Metropolitan Transit Authority of Harris County announced on Monday.

“Microtransit is a proven solution to get more people where they need to go safely and efficiently,” Houston Mayor John Whitmire said in a statement. “Connected communities are safer communities, and bringing microtransit to Houston builds on my promise for smart, fiscally-sound infrastructure growth.”

The program started in June 2023 when the city’s nonprofit Evolve Houston partnered with the for-profit Ryde company to offer free shuttle service to residents of Second and Third Ward. The shuttles are all-electric and take riders to bus stops, medical buildings, and grocery stores. Essentially, it works as a traditional ride-share service but focuses on multiple passengers in areas where bus access may involve hazards or other obstacles. Riders access the system through the Ride Circuit app.

So far, the microtransit system has made a positive impact in the wards according to METRO. This has led to the current expansion into the downtown area. The system is not designed to replace the standard bus service, but to help riders navigate to it through areas where bus service is more difficult.

“Integrating microtransit into METRO’s public transit system demonstrates a commitment to finding innovative solutions that meet our customers where they are,” said METRO Board Chair Elizabeth Gonzalez Brock. “This on-demand service provides a flexible, easier way to reach METRO buses and rail lines and will grow ridership by solving the first- and last-mile challenges that have hindered people’s ability to choose METRO.”

The City of Houston approved a renewal of the microtransit program in July, authorizing Evolve Houston to spend $1.3 million on it. Some, like council member Letitia Plummer, have questioned whether microtransit is really the future for METRO as the service cuts lines such as the University Corridor.

However, the microtransit system serves clear and longstanding needs in Houston. Getting to and from bus stops in the city with its long blocks, spread-out communities, and fickle pedestrian ways can be difficult, especially for poor or disabled riders. While the bus and rail work fine for longer distances, shorter ones can be underserved.

Even in places like downtown where stops are plentiful, movement between them can still involve walks of a mile or more, and may not serve for short trips.

“Our microtransit service is a game-changer for connecting people, and we are thrilled to launch it in downtown Houston,” said Evolve executive director Casey Brown. “The all-electric, on-demand service complements METRO’s existing fixed-route systems while offering a new solution for short trips. This launch marks an important milestone for our service, and we look forward to introducing additional zones in the new year — improving access to public transit and local destinations.”

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This article originally ran on CultureMap.