Cement Merger: Market Definition and the Price-Cap Offer
In the inland cement market, annual consumption is 5.0 million tonnes (Mt) and has grown 1% a year. Four suppliers serve the market: Alpha (46% share, 2.4 Mt capacity), Beta (24%, 1.0 Mt), Gamma (16%, 0.8 Mt) and imports (14%, 0.7 Mt, capped by a single rail corridor already at 95% utilisation in peak season). Alpha proposes to acquire Beta and argues that Gamma and imports will discipline the combined firm. Alpha's average variable cost is EUR 41/t and its average price is EUR 68/t. Cement is homogeneous; freight costs EUR 0.09 per tonne-km, and imports travel 400 km while Gamma's plant is 60 km from Beta's customers. Short-run demand elasticity is estimated at -0.35. The competition authority applies a 5% SSNIP test and presumes illegality where HHI exceeds 2,500 and the change exceeds 200. Alpha offers a five-year price cap instead of divesting Beta's plant.
1. Define the relevant market and calculate the pre- and post-merger HHI. What is the legal effect of the result, and what must the parties show to rebut it?
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Step 1 - Market definition. Cement is homogeneous and heavy, so freight is decisive. A 5% SSNIP is EUR 3.40/t, which buys only about 38 km of freight at EUR 0.09/t-km. Customers more than roughly 40 km from Beta cannot practically turn to imports 400 km away (EUR 36/t delivered freight, over half the price). The candidate market is therefore the regional inland market, not a national or global one. The rail corridor is at 95% utilisation, so import share is capacity-constrained rather than competitively chosen.
Step 2 - Concentration. Pre-merger HHI = 46² + 24² + 16² + 14² = 2,116 + 576 + 256 + 196 = 3,144. Post-merger Alpha-Beta = 70%, so HHI = 70² + 16² + 14² = 4,900 + 256 + 196 = 5,352. The change is 2,209.
Step 3 - Legal effect. Both screens are crossed (level above 2,500; delta above 200), which creates a rebuttable presumption of harm. It is not conclusive: the parties may show that Gamma and imports are sufficiently close substitutes, that entry is timely and likely, or that efficiencies are merger-specific and passed through. On these facts the capacity data make that rebuttal difficult.
2. Using critical-loss analysis and capacity data, assess whether the merged firm could profitably raise price by 5%.
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Margin. (P - AVC)/P = (68 - 41)/68 = 39.7%, call it 40%.
Critical loss. With a 5% price rise, critical loss = 5/(5 + 39.7) = 11.2%. If actual volume loss is below 11.2%, the increase is profitable for the merged firm.
Predicted loss. With elasticity -0.35, a 5% rise reduces quantity by roughly 5 × 0.35 = 1.75% of market volume, i.e. about 87,500 t. That is far below the 11.2% critical threshold, so the price rise would be profitable unless rivals absorb enough diverted volume to push price back down.
Capacity check. Alpha-Beta holds 3.4 Mt of 5.0 Mt capacity. Gamma has roughly 40,000 t of spare capacity (95% utilisation of 0.8 Mt) and the rail corridor about 35,000 t, a combined 75,000 t - less than the 87,500 t needed to discipline the increase in peak season. Off-peak, spare capacity is larger and the constraint weakens.
Unilateral-effects indicator. Beta's customers are homogeneous buyers, so diversion from Beta is split largely toward Alpha: roughly 46/70 = 66% of Beta's lost sales return to Alpha. This high diversion, combined with a 40% margin, implies a substantial upward pricing pressure and a plausible 3-5% post-merger increase in peak periods.
3. Evaluate the proposed five-year price cap against a divestiture of Beta's plant, and specify the conditions a divestiture would need.
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Price cap. A cap on average revenue is weak here for three reasons: (i) monitoring requires the authority to audit costs, volumes and product mix across several plants, and Alpha controls the data; (ii) a single average cap invites selective discounting and quality or delivery degradation, which are hard to detect in a homogeneous but logistics-heavy product; (iii) it fixes the symptom while leaving the structural incentive to coordinate with Gamma intact. Caps work better where the regulated service is simple and cost data are observable.
Divestiture. Selling Beta's 1.0 Mt plant (20% of demand) restores the pre-merger structure: Alpha 46%, divested Beta 24%, Gamma 16%, imports 14%, HHI back to 3,144. It creates a third independent supplier with capacity close to demand and preserves peak-season rivalry.
Conditions needed. (1) A buyer with independent logistics access, including contracted rail slots, otherwise the plant is a stranded asset; (2) a prohibition on long-term supply, tolling or offtake agreements between Alpha and the buyer; (3) a transitional service agreement limited to 12-18 months at cost; (4) a capacity-maintenance commitment and a compliance monitor; (5) an upfront-buyer requirement so the remedy is not left to a later sale to Alpha. On balance, divestiture is more proportionate than the cap because it removes the incentive rather than policing its exercise.