period. This change was primarily due to a $2.7 million decrease in concert series revenue at the Seaport, primarily related to the timing of concerts with 11 shows held during the second quarter of 2024, compared to 19 shows held during the second quarter of 2023. Additionally, there was a $1.2 million decrease in concession sales at the Las Vegas Ballpark and a $0.4 million decrease in Aviators ticket revenue, primarily related to lower attendance in the current quarter. These decreases were partially offset by a $0.6 million increase in sponsorship revenue at the Seaport due to the execution of four new sponsorship agreements in the current quarter and a $0.4 million increase in special event revenue at the Las Vegas Ballpark, primarily due to additional events held in the current quarter.
Sponsorships, Events, and Entertainment Costs. Sponsorships, events, and entertainment costs decreased $2.3 million, or 15%, to $12.5 million for the three months ended June 30, 2024, compared to $14.8 million in the prior-year period. This change was primarily due to a $1.4 million decrease in costs associated with the concert series at the Seaport, primarily due to the timing of concerts with fewer concerts held during the current period, and a $0.8 million decrease in costs at the Las Vegas Ballpark, primarily due to lower cost of sales and labor costs as expected with lower attendance and lower concessions revenue.
Provision for Doubtful Accounts. Provision for doubtful accounts increased to $1.0 million for the three months ended June 30, 2024, compared to no activity in the prior-year period, primarily due to a $0.5 million reserve associated with the Winterland Skating concept at the Seaport and a $0.4 million reserve associated with events at the Las Vegas Ballpark, both established during the three months ended June 30, 2024.
For the six months ended June 30, 2024
Sponsorships, Events, and Entertainment Adjusted EBITDA decreased $2.0 million compared to the prior-year period primarily due to the following:
Sponsorships, Events, and Entertainment Revenue. Sponsorships, events, and entertainment revenue decreased $3.3 million, or 13%, to $22.8 million for the six months ended June 30, 2024, compared to $26.2 million in the prior-year period. This change was primarily due to a $2.7 million decrease in concert series revenue at the Seaport, primarily related to the timing of concerts with 11 shows held during the first half of 2024, compared to 19 shows held during the first half of 2023. Additionally, there was a $1.3 million decrease in concession sales at the Las Vegas Ballpark and a $0.4 million decrease in Aviators ticket revenue, primarily related to lower attendance in the current period. These decreases were partially offset by a $0.7 million increase in special event revenue at the Las Vegas Ballpark, a $0.4 million increase in sponsorship revenue at the Seaport due to the execution of four new sponsorship agreements in the first half of 2024, and a $0.4 million increase in private event revenue at the Seaport.
Sponsorships, Events, and Entertainment Costs. Sponsorships, events, and entertainment costs decreased $3.4 million, or 16%, to $17.4 million for the six months ended June 30, 2024, compared to $20.8 million in the prior-year period. This change was primarily due to a $1.7 million decrease in costs associated with the Las Vegas Ballpark, primarily due to lower cost of sales and labor costs as expected with lower attendance and lower concessions revenue, a $1.4 million decrease in costs associated with the concert series at the Seaport, primarily due to the timing of concerts with fewer concerts held during the current period, and a $0.3 million decrease in breakdown and removal costs associated with the seasonal Winterland Skating concept at the Seaport.
Provision for Doubtful Accounts. Provision for doubtful accounts increased to $1.6 million for the six months ended June 30, 2024, compared to immaterial amounts in the prior-year period, primarily due to a $1.0 million reserve associated with the Winterland Skating concept at the Seaport and a $0.5 million reserve associated with events at the Las Vegas Ballpark, both established during the six months ended June 30, 2024.
Liquidity and Capital Resources
We historically operated as a division within HHH’s consolidated structure, which uses a centralized approach to cash management and financing of our operations. This arrangement is not reflective of the manner in which we would have financed our operations had we been an independent, publicly traded company during the periods presented. The cash and cash equivalents held by HHH at the corporate level are not specifically identifiable to us and, therefore, have not been reflected in our Unaudited Condensed Combined Financial Statements. As of June 30, 2024, and December 31, 2023, our