Germany is now set to join the likes of the U.S., Britain, and Portugal in piloting a shorter workweek. 

The program, which is set to start on Feb. 1, will last six months—the same as its peers’ experiments—and will include hundreds of employees across 45 participating companies, Dale Whelehan, CEO at Auckland, New Zealand–based 4 Day Week Global, the nonprofit leading the pilot, told Fortune. 

The tricky timing

The program follows a 100:80:100 principle, wherein participating companies stick to 100% of pay for 80% of the time while, in theory, achieving 100% output.

“This is essentially a human resource transformation project and it is a productivity intervention. Organizations are really struggling to grapple with improving their productivity or output of their businesses’ performance—that’s because they’re fundamentally missing the foundation of a business which is run by its people,” Whelehan said.

The four-day workweek, with its reputation for yielding promising results in past trials, will be rolled out at a tricky time for the German labor market, which faces a slew of pressures including farmers’ protests, a shortage in skilled workers, and sluggish economic growth.

In addition, recessionary fears and soft global demand are expected to cause a hiring freeze in the country through 2024. Groups of doctors and metalworkers also went on strike last year—both over wages and working hours (the metalworkers’ union IG Metall demanded a 32-hour workweek, which it secured in a deal last month). 

The debate surrounding working hours in Germany is a contentious one—an overwhelming 73% of Germans are in favor of cutting the workweek short while receiving the same wage.

“This conversation on the working time has been in the collective conscious of the public for quite a while, and there’s a great level of debate around whether this will work or not work,” Whelehan said.

As such, Germany, which is home to a large population of part-time workers, boasts lower hours worked in a year than the OECD average of 1,752 hours per year. And although the country has relatively low unemployment rates, having a labor force that works 21% less than the OECD average remains a strain on the economy. The country’s finance minister Christian Lindner has also been vocal about how working fewer hours could hurt prosperity.  

Longer hours actually needed?

The four-day workweek pilot in itself is unlikely to have significant ripple effects. But given how demographic changes are driving shifts such as a shortage in availability of skilled workers, Germany needs policies that can incentivize people to work longer hours, argues Holger Schäfer, a senior economist at the Institute of German Economy. 

“The four-day workweek won’t help any of the problems currently affecting the labor market. On the contrary, our most serious problem is the labor shortage caused by demographic change. Working fewer hours won’t alleviate that. We need better incentives to work longer hours to compensate for demographic change,” he told Fortune.

But reports have found links to higher productivity from having an additional day off in the workweek, something that has been observed in past pilots. Germany has seen productivity slide in recent years as a result of poor infrastructure investment—so could a shorter week help address that concern? Maybe not, Schäfer said. He thinks it can be hard to gauge productivity improvements from a short program involving voluntary participants. 

“The pilot study won’t generate an answer to the question whether or not the four-day workweek can be successful,” he said, adding that one shortcoming is that the sample set of participating companies won’t be compared to companies that maintain a five-day week, leaving many German companies unrepresented. 

A more likely outcome, Schäfer suggests, is that employers and employees will find new avenues to achieve flexibility by accommodating individual needs and preferences.   

Whelehan said that the 4DWG was working on recruiting “control participants,” or companies that don’t shrink their work hours, as points of reference when assessing metrics like productivity in future pilots. He acknowledged that there are areas of work as the pilot programs are very much a work in progress.

“You have to start research somewhere. This is us building the evidence case to showcase that something like this may work,” Whelehan said. “We’re still so young in the conversation about a four-day week.”

Benefits of the shorter workweek

Companies that have participated in four-day week pilots, such as in the U.K., have seen success in curbing burnout and sick days while improving job retention. Some German companies involved in the project are looking to make similar strides in the workplace. Advocates of the pilot have argued that a shorter week could be a magnet for untapped parts of the country’s labor market.  

“I’m absolutely convinced that investments in ‘new work’ pay off because they increase well-being and motivation, subsequently increasing efficiency,” Sören Fricke, cofounder of Stuttgart-based event planning company Solidsense, which is participating in the pilot project, told the outlet. “The four-day week, if it works, won’t cost us anything either in the long run.”