The hour is the oldest unit of human commerce, older than any coin. Before there were markets, there were mornings and evenings, and the distance between them was the budget within which all labor was conducted. To review the price of hours is to open the most fundamental ledger -- the one that records what life itself costs when measured in the only currency that cannot be minted.
Consider the hour spent in the waiting room of a municipal office: the fluorescent light buzzing at a frequency designed to make patience feel like punishment, the numbered ticket in your hand, the slow digital counter advancing one integer at a time. That hour costs differently depending on who holds it. The salaried worker loses nothing visible; the hourly worker loses a precise, calculable fraction of a day's wage; the elderly person loses something that no ledger can repay -- a portion of a diminishing remainder.
The market prices hours with brutal simplicity: the minimum wage, the billable rate, the overtime premium. But these are exchange values only. The use value of an hour -- what it could have held instead of waiting -- is unpriced and unpriceable. The sentimental value of an hour with someone who is dying is infinite by any rational measure and zero by the market's.
This review concludes that the hour is simultaneously the most traded and the most mispriced commodity in human commerce. Every transaction involving time contains a hidden subsidy from the buyer to the seller: the subsidy of unlived life. The ledger records the wage but not the cost.
The attention economy did not invent the scarcity of focus -- it merely discovered how to harvest it at industrial scale. Every notification is a bill presented to the mind, demanding payment in the form of a cognitive interrupt. The cost is not measured in won or dollars but in the fractured continuity of thought: the sentence unfinished, the idea abandoned mid-formation, the steady state of concentration shattered and slowly, expensively reassembled.
To review attention as currency is to recognize that it obeys the same laws as any other medium of exchange. It can be saved (through solitude and discipline), spent (through engagement and response), invested (through education and deep reading), and wasted (through infinite scroll). But unlike money, attention cannot be inherited, stored in a vault, or transferred to another person's account. It exists only in the present tense of a conscious mind, and it depletes with use in ways that sleep only partially restores.
The verdict of this ledger: attention is the one currency whose supply decreases with each transaction. Every exchange leaves the account holder poorer, regardless of what was purchased. The only profitable attention trade is the one that was never made -- the notification silenced, the feed unchecked, the hour spent looking at nothing in particular.