Why is the incumbency effect more helpful for members of House of Representatives?

The incumbency effect is more beneficial for members of the House of Representatives due to their shorter terms and the frequency of elections, which allows incumbents to build name recognition and establish strong connections with their constituents. House members often have the advantage of greater media coverage and fundraising capabilities, which help them maintain visibility and support. Additionally, they can leverage their position to secure local projects and funding, further solidifying their appeal to voters. This combination of factors makes it easier for House incumbents to be re-elected compared to those in other political offices.