Editing Mental Accounting (section)

== <span style="color: #FFFFFF;">Applying</span> ==
'''Modeling 'The Credit Card Trap' (Visualizing the 'Pain of Paying' vs 'Joy of Buying'):'''
<syntaxhighlight lang="python">
def calculate_purchase_pain(amount, payment_method):
    """
    Shows why Cards lead to overspending.
    """
    if payment_method == "Cash":
        # Immediate physical loss
        pain_factor = 1.0 
    elif payment_method == "Credit Card":
        # Delayed, abstract loss
        pain_factor = 0.5
    else: # 'Found Money'
        pain_factor = 0.1
        
    perceived_cost = amount * pain_factor
    return {
        "Method": payment_method,
        "Actual Cost": f"${amount}",
        "Perceived Cost (Mental)": f"${perceived_cost}"
    }

# Buying a $100 dinner
print(calculate_purchase_pain(100, "Cash"))
print(calculate_purchase_pain(100, "Credit Card"))
</syntaxhighlight>

; Accounting Landmarks
: '''The 'Nudge' Book''' → Thaler's masterpiece on how governments can use "Mental Accounting" to help people save for retirement (e.g., "Save More Tomorrow").
: '''Subscription Services''' → Why we forget about a $10/month charge. It's "Decoupled" from our daily spending, so it "Feels like zero" in our mental accounting.
: '''Rebate Checks''' → Why companies give "Rebates" instead of "Lower Prices." We treat the "Rebate" as "Found Money" and spend it, whereas a lower price just "Blends into the budget."
: '''The 'Sunk Cost' Theater''' → If you buy an expensive ticket to a game, and it starts "Snowing," you will go anyway (to "Avoid a Loss"). If someone "Gave you the ticket for free," you would "Stay home."
</div>

<div style="background-color: #8B4500; color: #FFFFFF; padding: 20px; border-radius: 8px; margin-bottom: 15px;">